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Cooler Master SK621 Review | 64 Data compared

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  • Avg. price in UK: ~£130
  • Avg. price in US: ~$120
  • Layout size: 60%
  • Connection type: USB / Bluetooth
  • Switch type: mechanical
  • Polling rate: 1000 Hz

Cooler Master SK621 review. Compare 64 technical specifications and user reviews to see how it ranks among keyboards and if it is worth buying.

6.0

Overall score

What it is: An overall evaluation of the keyboard's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best keyboards on the market.

Score components:

80.0%

5.9

Technical Score

20.0%

6.4

User score

Good
5.9

Technical Score

What it is: An assessment of the keyboard's technical performance, covering key areas such as switch feel, typing and gaming performance, layout and features, connectivity, build quality, backlighting, software, and comfort.

When it matters: When you want to compare keyboards based on technical performance and available features.

Score components:

34.0%

6.4

Connectivity & Power

28.0%

5.1

Switches

20.0%

6.0

Materials

12.0%

6.9

Features

6.0%

4.9

Design

Good
6.4

User score

What it is: A rating that combines user reviews and the total number of reviews received by the keyboard.

When it matters: When you want to understand how a keyboard performs in daily use or gaming and how reliable it is in terms of typing feel, noise level, comfort, and long-term durability.

Score components:

70.0%

7.4

User reviews

30.0%

3.8

Popularity

User score:
United Kingdom
amazon
3.7
(22)
amazon
3.8
(7)
United States
Amazon_logo.png
3.7
(22)
Amazon_logo.png
3.8
(7)

(Reviews last updated: Jun 2026)

Good
  • 3.5
    Gaming

    Score components:

    28.0%

    1.0

    Polling rate

    24.0%

    1.0

    Rapid trigger

    20.0%

    1.0

    Adjustable actuation

    16.0%

    10

    Hot-swappable switches

    12.0%

    10

    Onboard memory

  • 5.8
    Typing

    Score components:

    28.0%

    4.0

    Wrist rest included

    24.0%

    8.0

    Legend method

    20.0%

    4.0

    Adjustable feet

    15.0%

    9.8

    Typing angle

    13.0%

    4.0

    Pre-lubed stabilizers

  • 3.0
    Programming

    Score components:

    30.0%

    1.0

    QMK support

    26.0%

    1.0

    VIA support

    18.0%

    1.0

    Mac compatibility

    14.0%

    10

    Multi-device pairing

    12.0%

    7.0

    Connection type

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Best prices in UK

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Cooler Master SK621 is a compact 60% mechanical keyboard featuring Cherry MX Low Profile RGB switches with a 1.2mm actuation and 3.2mm total travel. Built with a brushed aluminum top plate and flat chiclet-style keycaps, it offers hybrid connectivity via Bluetooth 4.0 for up to three devices or a wired USB Type-C connection. Main pros include its extreme portability (weighing just 424g), high-quality build, and customizable per-key RGB lighting controlled by an on-board 32-bit ARM Cortex processor. However, notable cons include a steep learning curve for its flat keycap layout, the lack of adjustable feet for ergonomic angling, and some reports of initial Bluetooth connectivity stability issues.

Technical Specifications of Cooler Master SK621

Technical Score

What it is: An assessment of the keyboard's technical performance, covering key areas such as switch feel, typing and gaming performance, layout and features, connectivity, build quality, backlighting, software, and comfort.

When it matters: When you want to compare keyboards based on technical performance and available features.

Score components:

34.0%

6.4

Connectivity & Power

28.0%

5.1

Switches

20.0%

6.0

Materials

12.0%

6.9

Features

6.0%

4.9

Design

5.9
Cooler Master SK621 has a technical score of 5.93 points, which is lower than that of 75.4% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the keyboard.

When it matters: When you want to understand how a keyboard performs in daily use or gaming and how reliable it is in terms of typing feel, noise level, comfort, and long-term durability.

Score components:

70.0%

7.4

User reviews

30.0%

3.8

Popularity

User score:
United Kingdom
amazon
3.7
(22)
amazon
3.8
(7)
United States
Amazon_logo.png
3.7
(22)
Amazon_logo.png
3.8
(7)

(Reviews last updated: Jun 2026)

6.4
Cooler Master SK621 has a user score of 6.36 points, which is lower than that of 94.1% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by the keyboard.
When it matters: When you prefer a keyboard that has already been chosen and reviewed by many other users.
3.8
Cooler Master SK621 has a popularity of 3.8 points, which is lower than 62.5% of products in this category.
Ratio quality/price

What it is: An indicator that combines the keyboard's overall rating with its cost.

When it matters: When you are looking for a keyboard that offers a strong balance of performance, features, and price.

Score components:

60.0%

6.0

Overall score

40.0%

9.8

Price

7.2
Cooler Master SK621 has a quality-to-price ratio of 7.2 points, which is lower than 80.4% of products in this category.
Switch type
What it is: Identifies the switch technology used by the keyboard, such as mechanical, optical, or Hall effect.
When it matters: When you are choosing between different response technologies and their long-term behavior.

Importance: HIGH

mechanical
Switch feel
What it is: Describes the keypress character, such as linear, tactile, or clicky.
When it matters: When the sensation of each keypress changes comfort, control, and noise level for your use.

Importance: HIGH

linear
Switch name
What it is: States the specific switch model used by the keyboard.
When it matters: When the exact switch model matters because small tuning differences affect your preference.

Importance: MEDIUM

Cherry MX Low Profile Red
Actuation force
What it is: Measures how much force is needed to actuate a key.
When it matters: When finger fatigue, accidental presses, or key resistance matters to your typing style.

Importance: HIGH

45 g
Min actuation distance
What it is: Measures the shortest key travel needed to register an input.
When it matters: When faster key response matters and you want the shortest possible trigger point under your fingers.

Importance: MEDIUM

1.2 mm
Cooler Master SK621 has a minimum actuation distance of 1.2 mm, which is shorter than 59.9% of keyboards and equal to 15.6% of keyboards.
Show more
Keyboard type
What it is: Identifies the keyboard technology, such as mechanical, membrane, optical, or Hall effect.
When it matters: When you need a keyboard built around a specific switch technology or feel profile.

Importance: HIGH

mechanical
Layout size
What it is: States the keyboard form factor and how much of the standard keyset it includes.
When it matters: When desk space, portability, or access to a full key set affects how you work or play.

Importance: HIGH

60%
Layout standard
What it is: Specifies the regional layout standard, such as ANSI, ISO, or JIS.
When it matters: When you need a regional key layout that matches your language habits or keycap set.

Importance: MEDIUM

ANSI
N. of keys
What it is: States how many keys are present on the keyboard.
When it matters: When you need a certain number of keys for shortcuts, navigation, or a numpad.

Importance: MEDIUM

64
Cooler Master SK621 has 64 keys, which is fewer than 90.1% of keyboards and equal to 1.7% of keyboards.
Profile
What it is: Describes whether the keyboard uses a low-profile or standard-height design.
When it matters: When key height changes your typing comfort, travel distance, or the overall desk setup.

Importance: MEDIUM

low-profile
Show more
Connection type
What it is: Specifies how the keyboard connects, such as USB, 2.4 GHz wireless, or Bluetooth.
When it matters: When latency, cable management, or wireless flexibility is part of your buying decision.

Importance: HIGH

USB / Bluetooth
Cooler Master SK621 offers USB / Bluetooth connectivity, which is more versatile than 43.5% of keyboards and equal to 14% of keyboards.
Multi-device pairing
What it is: Shows whether the keyboard can stay paired with multiple devices for quicker switching.
When it matters: When you switch regularly between a laptop, tablet, and other devices on one desk.

Importance: HIGH

yes
Cooler Master SK621 supports multi-device pairing. 4.5% of keyboards support multi-device pairing.
up to 3 devices.
Bluetooth version
What it is: States the Bluetooth generation supported for wireless pairing.
When it matters: When wireless stability, compatibility, and energy efficiency are part of what you compare.

Importance: MEDIUM

4.0
Cooler Master SK621 uses Bluetooth 4.0, which is older than 54.1% of keyboards and equal to 1.7% of keyboards.
Mac compatibility
What it is: Shows whether the keyboard is intended to work properly with macOS layouts, shortcuts, or legends.
When it matters: When you need the keyboard to work properly with macOS shortcuts and key mapping.

Importance: HIGH

no
Cooler Master SK621 is not Mac compatible. 55.9% of keyboards work with Mac.
Battery life
What it is: Estimates how long the keyboard can run on a full charge.
When it matters: When the keyboard needs to last through workweeks, travel, or long gaming stretches without constant charging.

Importance: HIGH

15 h
Cooler Master SK621 lasts 15 h on a charge, which is shorter than 98.3% of keyboards and equal to 1.7% of keyboards.
RGB on.
Show more
RGB lighting
What it is: Shows whether the keyboard includes customizable RGB lighting effects.
When it matters: When visual customization and desk aesthetics matter to your setup.

Importance: HIGH

yes
Cooler Master SK621 has RGB lighting. 12.3% of keyboards have RGB lighting.
Per-key RGB
What it is: Shows whether each key can be lit and controlled independently instead of sharing one uniform lighting zone.
When it matters: When customizing each key individually matters for visuals, games, or shortcut visibility.

Importance: HIGH

yes
Cooler Master SK621 has per-key RGB lighting. 23% of keyboards have per-key RGB lighting.
RGB zones
What it is: States how many RGB lighting zones can be controlled separately.
When it matters: When you want more lighting control than a simple all-at-once backlight can provide.

Importance: LOW

64
Cooler Master SK621 has 64 RGB zones, which is fewer than 72.7% of keyboards and equal to 1.4% of keyboards.
Underglow / side lighting
What it is: Shows whether the case includes lighting around the underside or outer edges in addition to the keys themselves.
When it matters: When edge lighting is part of the visual style you want from the keyboard.

Importance: MEDIUM

yes
Cooler Master SK621 includes underglow lighting. 68.6% of keyboards include underglow lighting.
Backlight direction
What it is: Specifies whether the switches use north-facing or south-facing backlighting.
When it matters: When you care about switch compatibility, keycap interference, or lighting placement.

Importance: LOW

north-facing
Show more
Case material
What it is: Describes the main material used for the keyboard case.
When it matters: When build feel, rigidity, and overall finish influence your sense of quality.

Importance: HIGH

aluminum/plastic
Plate material
What it is: Describes the material used for the mounting plate beneath the switches.
When it matters: When keyboard stiffness, sound profile, and bottom-out feel matter more than the switch spec sheet alone.

Importance: HIGH

aluminum
Keycap material
What it is: Describes the material used to make the keycaps.
When it matters: When surface texture, wear resistance, and sound of the keycaps affect your choice.

Importance: HIGH

ABS
Keycap profile
What it is: Describes the shape and height profile of the keycaps.
When it matters: When key shape and sculpting affect comfort, wrist angle, and the sound of each press.

Importance: MEDIUM

low-profile
Legend method
What it is: Describes how the legends are applied to the keycaps, which affects durability and visibility.
When it matters: When you care about how long key legends stay readable after heavy use.

Importance: MEDIUM

laser-etched
Cooler Master SK621 uses laser-etched legends, which are less durable than 85.7% of keyboards and equal to 11.5% of keyboards.
Secondary legends are pad-printed.
Show more

Cooler Master SK621 vs the average keyboard

  • 0.8 mm shorter key travel
    Cooler Master SK621 has 3.2 mm of total travel, while the average keyboard has 4 mm.
    What it is: Measures the full distance a key can move from top to bottom.
    When it matters: When full key movement changes comfort, speed, or the way the keyboard feels under your fingers.

    Importance: MEDIUM

    Cooler Master SK621 has 3.2 mm of total travel, while the average keyboard has 4 mm.3.2 mm vs 4 mm
  • 2 h shorter charging time
    Cooler Master SK621 charges faster than the average keyboard (2 h vs 4 h). The average keyboard takes 4 h to charge.
    What it is: Measures how long the battery needs for a full recharge.
    When it matters: When short charging windows matter and you do not want the keyboard tied to a cable for too long.

    Importance: MEDIUM

    Cooler Master SK621 charges faster than the average keyboard (2 h vs 4 h). The average keyboard takes 4 h to charge.2 h vs 4 h
  • 0.8 mm shorter actuation distance
    Cooler Master SK621 has a longer maximum actuation distance than the average keyboard (1.2 mm vs 2 mm). The average keyboard has a maximum actuation distance of 2 mm.
    What it is: Measures the highest configurable actuation point or trigger position.
    When it matters: When you want precise control over how deep a key can be set to trigger for different games or typing styles.

    Importance: MEDIUM

    Cooler Master SK621 has a longer maximum actuation distance than the average keyboard (1.2 mm vs 2 mm). The average keyboard has a maximum actuation distance of 2 mm.1.2 mm vs 2 mm
  • Underglow lighting
    Cooler Master SK621 includes underglow lighting, the average keyboard does not. 31.6% of keyboards include underglow lighting.
    What it is: Shows whether the case includes lighting around the underside or outer edges in addition to the keys themselves.
    When it matters: When edge lighting is part of the visual style you want from the keyboard.

    Importance: MEDIUM

    Cooler Master SK621 includes underglow lighting, the average keyboard does not. 31.6% of keyboards include underglow lighting.
  • 56.6% lower weight
    Cooler Master SK621 weighs less than the average keyboard (424 g vs 976 g). The average keyboard weighs 976 g.
    What it is: Measures the total mass of the keyboard.
    When it matters: When you care whether the keyboard feels easy to carry or heavy enough to stay planted on the desk.

    Importance: HIGH

    Cooler Master SK621 weighs less than the average keyboard (424 g vs 976 g). The average keyboard weighs 976 g.424 g vs 976 g
  • 0.5 mm shorter actuation distance
    Cooler Master SK621 has a shorter minimum actuation distance than the average keyboard (1.2 mm vs 1.7 mm). The average keyboard has a minimum actuation distance of 1.7 mm.
    What it is: Measures the shortest key travel needed to register an input.
    When it matters: When faster key response matters and you want the shortest possible trigger point under your fingers.

    Importance: MEDIUM

    Cooler Master SK621 has a shorter minimum actuation distance than the average keyboard (1.2 mm vs 1.7 mm). The average keyboard has a minimum actuation distance of 1.7 mm.1.2 mm vs 1.7 mm
  • 1.9 ° lower typing angle
    Cooler Master SK621 has a lower typing angle than the average keyboard (3.1 ° vs 5 °). The average keyboard has a typing angle of 5 °.
    Adjustable to 620 and 621.
    What it is: Measures the incline of the keyboard during use.
    When it matters: When wrist posture and typing comfort depend on how steeply the keyboard sits.

    Importance: MEDIUM

    Cooler Master SK621 has a lower typing angle than the average keyboard (3.1 ° vs 5 °). The average keyboard has a typing angle of 5 °.3.1 ° vs 5 °
  • 9.3 mm lower keyboard height
    Cooler Master SK621 is lower than the average keyboard (29.2 mm vs 38.5 mm). The average keyboard height is 38.5 mm.
    What it is: Measures the keyboard's vertical dimension from its base to its highest point.
    When it matters: When the keyboard has to fit under shelves, trays, or other tight desk constraints.

    Importance: MEDIUM

    Cooler Master SK621 is lower than the average keyboard (29.2 mm vs 38.5 mm). The average keyboard height is 38.5 mm.29.2 mm vs 38.5 mm
  • 56.6% lower weight
    Cooler Master SK621 weighs less than the average keyboard (424 g vs 976 g). The average keyboard weighs 976 g.
  • 1.9 ° lower typing angle
    Cooler Master SK621 has a lower typing angle than the average keyboard (3.1 ° vs 5 °). The average keyboard has a typing angle of 5 °.
  • 9.3 mm lower keyboard height
    Cooler Master SK621 is lower than the average keyboard (29.2 mm vs 38.5 mm). The average keyboard height is 38.5 mm.
  • 62 mm narrower width
    Cooler Master SK621 is narrower than the average keyboard (293 mm vs 355 mm). The average keyboard width is 355 mm.
  • 8.8 mm thinner design
    Cooler Master SK621 is thinner than the average keyboard (29.2 mm vs 38 mm). The average keyboard thickness is 38 mm.
  • 2 h shorter charging time
    Cooler Master SK621 charges faster than the average keyboard (2 h vs 4 h). The average keyboard takes 4 h to charge.
  • 0.8 mm shorter key travel
    Cooler Master SK621 has 3.2 mm of total travel, while the average keyboard has 4 mm.
  • 0.8 mm shorter actuation distance
    Cooler Master SK621 has a longer maximum actuation distance than the average keyboard (1.2 mm vs 2 mm). The average keyboard has a maximum actuation distance of 2 mm.
  • 0.5 mm shorter actuation distance
    Cooler Master SK621 has a shorter minimum actuation distance than the average keyboard (1.2 mm vs 1.7 mm). The average keyboard has a minimum actuation distance of 1.7 mm.
  • Underglow lighting
    Cooler Master SK621 includes underglow lighting, the average keyboard does not. 31.6% of keyboards include underglow lighting.

Total
Design
Connectivity & Power
Switches
Features
  • 23 fewer keys
    Cooler Master SK621 has fewer keys than the average keyboard (64 vs 87). The average keyboard has 87 keys.
  • No adjustable feet
    Cooler Master SK621 does not have adjustable feet, the average keyboard does. 85.5% of keyboards have adjustable feet.
  • 4 older release date
    Cooler Master SK621 is older than the average keyboard (2,019 vs 2,023). The average keyboard was released in 2,023.
    May 2019.
  • Less versatile connectivity
    Cooler Master SK621 offers less versatile connectivity than the average keyboard (USB / Bluetooth vs USB / 2.4GHz / Bluetooth). The average keyboard offers USB / 2.4GHz / Bluetooth connectivity.
  • Limited Mac support
    Cooler Master SK621 is not Mac compatible, the average keyboard is. 55.8% of keyboards are Mac compatible.
  • 151 h shorter battery life
    Cooler Master SK621 lasts less long on a charge than the average keyboard (15 h vs 166 h). The average keyboard lasts 166 h on a charge.
    RGB on.
  • Older Bluetooth version
    Cooler Master SK621 uses an older Bluetooth version than the average keyboard (4 vs 5.2). The average keyboard uses Bluetooth 5.2.
  • No pre-lubed stabilizers
    Cooler Master SK621 does not have pre-lubed stabilizers, the average keyboard does. 81.1% of keyboards come with pre-lubed stabilizers.
  • 19 fewer RGB zones
    Cooler Master SK621 has fewer RGB zones than the average keyboard (64 vs 83). The average keyboard has 83 RGB zones.
  • Less versatile connectivity
    Cooler Master SK621 offers less versatile connectivity than the average keyboard (USB / Bluetooth vs USB / 2.4GHz / Bluetooth). The average keyboard offers USB / 2.4GHz / Bluetooth connectivity.
    What it is: Specifies how the keyboard connects, such as USB, 2.4 GHz wireless, or Bluetooth.
    When it matters: When latency, cable management, or wireless flexibility is part of your buying decision.

    Importance: HIGH

    Cooler Master SK621 offers less versatile connectivity than the average keyboard (USB / Bluetooth vs USB / 2.4GHz / Bluetooth). The average keyboard offers USB / 2.4GHz / Bluetooth connectivity.USB / Bluetooth vs USB / 2.4GHz / Bluetooth
  • Limited Mac support
    Cooler Master SK621 is not Mac compatible, the average keyboard is. 55.8% of keyboards are Mac compatible.
    What it is: Shows whether the keyboard is intended to work properly with macOS layouts, shortcuts, or legends.
    When it matters: When you need the keyboard to work properly with macOS shortcuts and key mapping.

    Importance: HIGH

    Cooler Master SK621 is not Mac compatible, the average keyboard is. 55.8% of keyboards are Mac compatible.
  • 151 h shorter battery life
    Cooler Master SK621 lasts less long on a charge than the average keyboard (15 h vs 166 h). The average keyboard lasts 166 h on a charge.
    RGB on.
    What it is: Estimates how long the keyboard can run on a full charge.
    When it matters: When the keyboard needs to last through workweeks, travel, or long gaming stretches without constant charging.

    Importance: HIGH

    Cooler Master SK621 lasts less long on a charge than the average keyboard (15 h vs 166 h). The average keyboard lasts 166 h on a charge.15 h vs 166 h
  • No pre-lubed stabilizers
    Cooler Master SK621 does not have pre-lubed stabilizers, the average keyboard does. 81.1% of keyboards come with pre-lubed stabilizers.
    What it is: Shows whether the stabilizers arrive factory-lubricated instead of requiring manual tuning for smoother larger keys.
    When it matters: When larger keys like space, enter, and shift need to feel smoother and sound less rattly out of the box.

    Importance: MEDIUM

    Cooler Master SK621 does not have pre-lubed stabilizers, the average keyboard does. 81.1% of keyboards come with pre-lubed stabilizers.
  • 23 fewer keys
    Cooler Master SK621 has fewer keys than the average keyboard (64 vs 87). The average keyboard has 87 keys.
    What it is: States how many keys are present on the keyboard.
    When it matters: When you need a certain number of keys for shortcuts, navigation, or a numpad.

    Importance: MEDIUM

    Cooler Master SK621 has fewer keys than the average keyboard (64 vs 87). The average keyboard has 87 keys.64 vs 87
  • Older Bluetooth version
    Cooler Master SK621 uses an older Bluetooth version than the average keyboard (4 vs 5.2). The average keyboard uses Bluetooth 5.2.
    What it is: States the Bluetooth generation supported for wireless pairing.
    When it matters: When wireless stability, compatibility, and energy efficiency are part of what you compare.

    Importance: MEDIUM

    Cooler Master SK621 uses an older Bluetooth version than the average keyboard (4 vs 5.2). The average keyboard uses Bluetooth 5.2.4.0 vs 5.2
  • 19 fewer RGB zones
    Cooler Master SK621 has fewer RGB zones than the average keyboard (64 vs 83). The average keyboard has 83 RGB zones.
    What it is: States how many RGB lighting zones can be controlled separately.
    When it matters: When you want more lighting control than a simple all-at-once backlight can provide.

    Importance: LOW

    Cooler Master SK621 has fewer RGB zones than the average keyboard (64 vs 83). The average keyboard has 83 RGB zones.64 vs 83
  • No adjustable feet
    Cooler Master SK621 does not have adjustable feet, the average keyboard does. 85.5% of keyboards have adjustable feet.
    What it is: Shows whether the keyboard includes feet that let you raise or tilt the typing angle.
    When it matters: When your comfort depends on changing typing angle without buying a separate stand or wrist support.

    Importance: MEDIUM

    Cooler Master SK621 does not have adjustable feet, the average keyboard does. 85.5% of keyboards have adjustable feet.
Total
Overall
Design
Connectivity & Power
Materials
Features

Graphic comparison of Cooler Master SK621 and

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Third-party reviews

United Kingdom
amazon
3.7
22 Reviews
amazon
3.8
7 Reviews
United States
Amazon_logo.png
3.7
22 Reviews
Amazon_logo.png
3.8
7 Reviews

(Reviews last updated: Jun 2026)

What customers like about Cooler Master SK621?

  • Ultra-portable and compact 60% form factor, making it ideal for travel
  • Premium build quality featuring a sturdy brushed aluminum top plate
  • Versatile hybrid connectivity allowing both wired (USB-C) and wireless (Bluetooth 4.0) use
  • Can pair and quickly switch between up to three different Bluetooth devices
  • Vibrant, per-key RGB backlighting with numerous customizable effects
  • Responsive typing experience with genuine Cherry MX Low Profile Red switches
  • Extensive 'on-the-fly' controls for macros and lighting without needing extra software

What customers dislike about Cooler Master SK621?

  • Flat, chiclet-style keycaps can make touch typing difficult and lead to more typos
  • Cramped layout with a shrunken right Shift key and uniquely placed Delete key requires a learning curve
  • No adjustable feet or risers, so the keyboard always sits at a fixed, relatively flat angle
  • Bluetooth connectivity can occasionally be unstable or have lag without recent firmware updates
  • Software customization (Cooler Master Portal) can only be accessed while in wired mode
  • Battery life is significantly shorter when RGB lighting is set to high brightness

Expert reviews

M
mmorpg.com
07/05/2019
Cooler Master SK621 Low Profile Mechanical Keyboard Review

The MMORPG.com review highlights the Cooler Master SK621 as an ultra-compact 60% keyboard featuring Cherry MX Low Profile Red switches, brushed aluminum, and dual-mode Bluetooth 4.0/USB-C connectivity, which provides an excellent, portable, and customizable RGB gaming experience. However, the, compact layout requires a steep learning curve due to missing keys and non-standard keycap...Read more

I
ign.com
07/05/2019
Cooler Master SK621 Compact Mechanical Wireless Keyboard Review - IGN

The Cooler Master SK621 is a compact, 60% hybrid mechanical keyboard priced at $119.99 that utilizes low-profile Cherry MX Red linear switches. Designed for portable gaming, it features a minimalist design with a brushed aluminium top plate, a reflective brass bezel, dynamic per-key RGB backlighting, and a detachable braided USB-C cable for wired use or charging. Its standout...Read more

A
aphnetworks.com
07/05/2019
Cooler Master SK621 Review - APH Networks

The Cooler Master SK621 is a compact, minimalist 60% Bluetooth 4.0 wireless mechanical keyboard equipped with Cherry MX Red Low Profile linear switches and independent key RGB backlighting. Its lightweight 424g design features a clean, gunmetal brushed aluminium backplate, a detachable braided USB Type-C cable, and a 32-bit ARM Cortex M3 processor that enables complex on-the-fly...Read more

O
overclock3d.net
08/05/2019
Cooler Master SK621 Wireless Keyboard Review - OC3D

The Overclock3D review highlights the Cooler Master SK621 as a highly portable, 60% form factor mechanical keyboard with a premium, sturdy brushed aluminium design, earning it a Gamers Choice Award. Key advantages include low-profile Cherry MX Red switches, vibrant per-key RGB lighting, and flexible hybrid connectivity via Bluetooth or USB-C. Conversely, the compact layout results...Read more

T
techpowerup.com
08/05/2019
Cooler Master SK621 Keyboard Review

The Cooler Master SK621, a 60% ultra-portable wireless mechanical keyboard, features a premium brushed-aluminum design with Cherry MX Low Profile RGB switches, per-key lighting, and versatile Bluetooth 4.0/USB-C connectivity with a 4000 mAh battery. Key pros include its compact form factor, long battery life, and solid build quality, making it suitable for mobile users. Conversely,...Read more

P
pcworld.com
04/06/2019
Cooler Master SK621 review: A compact keyboard for creative pros

The Cooler Master SK621 is a highly portable, wireless 60% mechanical keyboard featuring a brushed aluminum top plate, vibrant RGB backlighting, and genuine Cherry MX Low Profile Red switches. It offers versatile connectivity, including Bluetooth for up to three devices and a USB Type-C port, making it an aesthetically pleasing, premium-feeling option for mobile creative...Read more

M
macsources.com
14/04/2020
Cooler Master SK621 White Wireless Mechanical Keyboard Review

The MacSources review of the Cooler Master SK621 White Wireless Mechanical Keyboard highlights it as an aesthetically striking, ultra-compact "special edition" hybrid keyboard that can be used via Bluetooth 4.0 or a detachable braided USB-C cable. Built with a premium brushed aluminum top plate, it features Cherry MX Low Profile RGB switches that offer a soft, smooth tactile feel...Read more

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geekdad.com
07/06/2019
Cooler Master SK621 Bluetooth Keyboard Review

The Cooler Master SK621 Bluetooth Keyboard is reviewed as a highly compact, ultra-portable 60% tenkeyless mechanical keyboard tailored for gamers and writers on the go. Built with a premium gunmetal aluminum and plastic chassis, it balances lightweight portability with structural rigidity, fitting easily alongside a tablet inside a standard shoulder bag. A standout feature is its...Read more

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bit-tech.net
09/05/2019
Cooler Master SK621 Review

The bit-tech.net review evaluates the Cooler Master SK621, a niche £140 ($120) mechanical gaming keyboard built around a highly compact 60% form factor, wireless Bluetooth connectivity, per-key RGB lighting, and low-profile Cherry MX Red switches. The review praises its sturdy yet lightweight build quality, featuring a premium brushed aluminium top-plate, and its excellent space...Read more

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guru3d.com
07/05/2019
Cooler Master SK621 Compact Keyboard Review

KitGuru The review underscores several notable pros and cons concerning the daily usability of the device. Among its positive attributes, the pros include its sturdy, "downright sexy" low-profile design, excellent portability, and smooth low-profile Cherry MX switches that enhance the gaming experience. Its hybrid wireless/wired configuration, on-the-fly macro creation, and...Read more

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tomshardware.com
07/05/2019
Cooler Master SK621 Mechanical Keyboard Review | Tom's Hardware

The Cooler Master SK621 is an ultra-portable, 60% mechanical keyboard designed for users who need a travel-friendly typing solution. Measuring just 11.5 x 4.1 x 1.1 inches and weighing under a pound (424g), it features a sleek brushed-aluminum top plate and dual-mode connectivity via Bluetooth 4.0 or a braided USB-C cable. It is equipped with low-profile Cherry MX Red linear...Read more

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modders-inc.com
09/05/2019
Review of the Cooler Master SK621 Wireless Keyboard

The Cooler Master SK621 is a compact, 60% layout wireless mechanical keyboard designed for high-performance typing, gaming, and everyday portable use. It features Cherry MX Red low-profile switches that mirror the feel of traditional linear switches but feature a slightly shorter actuation distance. Highly praised for its versatility, the keyboard easily fits into a laptop bag and...Read more

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medium.com
07/06/2019
Cooler Master SK621 Bluetooth Keyboard Review | by GeekDad

The Cooler Master SK621 is a compact 60% mechanical wireless keyboard praised for its durable build, superior tactile responsiveness, and seamless multi-device Bluetooth connectivity, making it ideal for portable use. While offering a premium typing experience over discount models, the keyboard features a condensed layout that requires an initial learning curve for secondary...Read more

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tweaktown.com
13/08/2019
Cooler Master SK621 Compact 60% Wireless Keyboard Review

The Cooler Master SK621 is a compact, 60% mechanical wireless keyboard that prioritises portability and a sleek aesthetic using low-profile Cherry MX RGB Red switches. Constructed with a brushed aluminum top plate and a plastic base, it offers both Bluetooth 4.0 and wired USB-C connectivity, making it versatile for use with PCs, tablets, and phones. The keyboard is packed with...Read more

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hardwareinside.de
26/11/2020
Cooler Master SK621 review

The Hardware-Inside review outlines the Cooler Master SK621 as a high-quality, ultra-compact mechanical keyboard featuring a 60% layout and premium brushed aluminium gunmetal top plate. It is highly praised for its mobility, offering a hybrid design with both a detachable USB-C braided cable and Bluetooth 4.0 connectivity that supports up to three devices. Equipped with linear...Read more

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igorslab.de
02/09/2019
Reviews - Cooler Master SK630 and SK621 Review

A standout feature (Pro) of both models is the onboard profile storage, which saves up to four independent lighting and macro profiles directly onto the keyboard hardware. This eliminates the need for background desktop software and makes them highly compatible for plug-and-play use on alternative operating systems like Linux. Additionally, the SK621 adds the major benefit (Pro) of...Read more

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hardwareluxx.de
21/07/2019
Cooler Master SK621 Review: Wireless Mini Keyboard with Cherry MX Low Profile

Yes, the Cooler Master SK621 is a premium wireless 60% mini-keyboard that combines Cherry MX Low Profile RGB Red mechanical switches with Bluetooth 4.0 connectivity. Priced at €139.99, it features an ultra-compact design that removes the numpad and compresses the remaining layout to maximize portability. It provides a key travel distance of 1.2 mm to actuation and requires 45 grams...Read more

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ginjfo.com
21/05/2019
Cooler Master SK621 Keyboard Review - GinjFo

The GinjFo review highlights the Cooler Master SK621 as an elegant, compact 65-key wireless mechanical keyboard featuring a brushed aluminum top plate, Cherry MX low-profile switches, and dual-mode hybrid connectivity. It is praised for its portability and responsive typing experience. However, the keyboard is criticized for its flat, low-profile layout that requires a steep...Read more

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clubic.com
No specific date listed
Cooler Master SK621: Best Price, Reviews and News - Clubic

Cooler Master SK621 Review Summary The Cooler Master SK621 is a compact, low-profile mechanical keyboard designed specifically for gamers, earning an impressive 9 out of 10 rating. This ultra-portable, lightweight (424g) AZERTY keyboard features a French layout and physical dimensions of 293mm x 29.2mm x 103mm. It is built with highly responsive Cherry MX Low Profile mechanical...Read more

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tomshardware.fr
20/05/2019
Mini Review: Cooler Master's SK621 compact keyboard is one of the smallest

The Tom's Hardware review awards the Cooler Master SK621 a highly positive 9/10 rating, praising it as an exceptionally elegant, responsive, and ultra-compact 60% mechanical gaming keyboard. Built with high-quality brushed aluminium and a frameless open chassis, the keyboard features Cherry MX RGB Low Profile Red switches combined with completely flat keycaps. This unique design...Read more

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gamertech.fr
04/09/2019
Cooler Master SK621 | A Low-Profile Bluetooth Keyboard! - GamerTech

The Cooler Master SK621 is an ultra-compact, 60% mechanical gaming keyboard designed for portability and minimalist setups. Priced around €129, its standout pros include true Bluetooth 4.0 wireless connectivity that pairs with up to three devices simultaneously, a sleek brushed aluminium top-plate, and vibrant, fully customizable per-key RGB backlighting. It uniquely utilizes linear...Read more

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gameit.es
24/01/2020
Cooler Master SK621: Unboxing and review of this mechanical mini keyboard

The Cooler Master SK621 is a compact 60% wireless mechanical keyboard designed for maximum portability and spaces with limited room. Built with high-quality plastic and a robust aluminium top plate, it features low-profile Cherry MX RGB Red switches, a 1,000 Hz polling rate, and a 1 ms response time. It provides excellent versatility by offering dual-connectivity: users can connect...Read more

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profesionalreview.com
01/09/2019
Cooler Master SK621 Review (Full Analysis)

Cooler Master SK621 Review Summary The Cooler Master SK621 is a compact, 60% mechanical gaming keyboard designed for portability and versatility, featuring a brushed aluminium top plate and low-profile, flat chiclet-style keycaps. It is equipped with low-profile Cherry MX Red linear switches and vibrant per-key RGB backlighting, manageable either directly via "On-The-Fly" keyboard...Read more

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hwupgrade.it
09/01/2020
Cooler Master SK621 Review: The Compact and Portable Mechanical Keyboard

Cooler Master SK621 Review Summary The Cooler Master SK621 is a compact, highly portable 60% layout mechanical keyboard that balances mainstream gaming performance with versatile wireless connectivity. Weighing only 424 grams and built with a solid brushed aluminium top plate, it uses low-profile Cherry MX Red switches to deliver a responsive, tactile experience with a shortened...Read more

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hwupgrade.it
09/01/2020
Cooler Master SK621 Review: The Compact and Portable Mechanical Keyboard

The Cooler Master SK621 is a compact, highly portable 60% mechanical keyboard featuring low-profile Cherry MX Red switches, a brushed aluminium top plate, and dual connectivity options via USB Type-C and Bluetooth for up to three devices. It is well-suited for gaming, delivering precise and satisfying performance in fast-paced titles, and boasts an impressive battery life of several...Read more

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hardware.info
27/06/2019
Buying Guide: Which mechanical keyboard should you get?

This review details the best low-profile mechanical keyboards, highlighting the Corsair K70 MK.2 Low Profile as a top-tier choice for its premium build quality and features. The keyboard retains full-sized, wide borders and dedicated media controls, but utilizes special low-profile switches to achieve a much thinner design. Pros include its sleek, high-quality aesthetics, a...Read more

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tweakers.net
29/07/2019
Cooler Master SK621 (US Qwerty) - pclinde - Product reviews

The Cooler Master SK621 is a highly compact, 60% mechanical keyboard designed for maximum portability and broad productivity across multiple devices. It features linear Cherry MX Red Low Profile switches that significantly decrease the keyboard's overall height and travel distance compared to standard mechanical variants. Its core strengths lie in its versatile connectivity,...Read more

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tweakers.net
24/09/2019
Low-Profile Mechanical Keyboards: A Roundup", "Low-Profile Mechanical Keyboard Roundup

The Tweakers roundup evaluates five low-profile mechanical keyboards, highlighting the Sharkoon PureWriter RGB as the "Best Buy". Priced at approximately €80, it offers excellent value by matching the core functionality of premium alternatives at less than half the cost. It is highly praised for its comfortable typing feel on Kailh Choc Red switches, height adjustability, and the...Read more

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hardware.info
13/05/2020
Small but nice to type on: 17 compact mechanical keyboards tested

Here is a specific summary of the compact mechanical keyboard group review: Review Summary This review evaluates 17 compact mechanical keyboards without numpads (Tenkeyless/TKL and 60% layouts), highlighting their space-saving benefits and improved ergonomics for mouse placement. In the budget category under €100, the Sharkoon PureWriter TKL RGB earned a "Great Value" award for its...Read more

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