Cooler Master SK621 Review | 64 Data compared

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 spacing, making it less ideal for heavy typing and prone to accidental keystrokes.

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 positive attributes include an incredibly sturdy build quality with zero frame flex, a remarkably quiet typing experience compared to standard mechanical keyboards, and highly responsive gameplay owing to the shorter 3.2mm key travel and 1.2mm actuation distance. Furthermore, it excels in portability—fitting easily into an included velvet travel bag—and offers exceptional customisation, allowing users to record macros, reassign keys, and mix RGB layouts directly via "On-the-Fly" shortcut keys or through Cooler Master’s robust Portal desktop software. Despite its premium construction, the reviewer notes several distinct drawbacks that prevent it from being a universal fit. The primary issue stems from the flat, laptop-style chiclet keycaps which sit exceptionally close together with only a 3mm gutter between them, leading to a consistently high typo...

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 macro and lighting programming without software. Wireless connectivity allows pairing with up to three devices with 6-key rollover (6KRO), while wired mode upgrades performance to full N-key rollover (NKRO). Battery performance is highly practical, lasting up to 15 hours with the LEDs active and an estimated four to five months with the backlighting switched off. Pros and Cons Pros: The sleek aesthetic matches premium design standards, effectively hiding fingerprints on its metal surface while maintaining a highly portable, featherweight profile. The low-profile Cherry MX switches offer a responsive, relatively quiet typing experience with a shorter 1.2mm actuation point. Additionally, the user-friendly Cooler Master Portal software allows easy configuration profile management saved directly to the device's 512KB internal memory. Cons: The aluminium backplate exhibits slight...

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 in a steep learning curve due to the lack of dedicated F-keys and a flat, closely spaced keycap design. Furthermore, the complex, software-free on-the-fly customization, combined with a high price point, may deter some users.

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, the review highlights significant cons, including flat, uniform keycaps that hinder typing, thin ABS keycaps prone to wear, and inconsistent Bluetooth performance, along with clunky software requiring a wired connection for updates. The keyboard aims for high portability but sacrifices comfort and connection stability in the process.

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 professionals.

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 and a nearly silent operation compared to standard mechanical keyboards. On the positive side (pros), the reviewer praises its standalone visual appeal for compact desktop setups, bright per-key RGB backlighting that is adjustable directly via on-the-fly keystrokes, and out-of-the-box functionality that requires no extra software—even offering unique control options for Apple Mac users. However, the review details notable drawbacks (cons) regarding the keyboard's ergonomic design and daily productivity limitations. Because of its condensed 60% layout, the key spacing is exceptionally close together, which caused the reviewer to suffer a 27% drop in average typing speed, a high number of missed keystrokes, and frequent accidental double letters. Additionally, the physical chassis is designed with no built-in flip-out feet, forcing the hardware to...

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 hybrid connectivity, utilizing reliable Bluetooth 4.0 that effortlessly pairs with up to three distinct devices—such as iPads, Galaxy tablets, and smartphones—alongside a detachable braided USB Type-C to Type-A cable for wired operation and charging. Performance is driven by a 32-bit ARM Cortex M0 processor paired with N-Key Rollover technology to maximize keystroke accuracy and response speeds. Additionally, it features fully customizable, vibrant per-key RGB lighting that can be adjusted via Cooler Master’s Portal software or directly through on-the-fly hotkeys without needing background software. Despite its premium features, the reviewer highlights specific trade-offs, primarily revolving around the learning curve and price point. The implementation of low-profile Cherry MX RGB switches creates a softer typing feel with a noticeably shorter key travel distance compared to full-sized...

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 efficiency which makes it ideal for travel. It includes useful "on-the-fly" physical shortcuts mapped to keycap symbols and an included travel pouch. Additionally, its battery life is outstanding, promising four to five months of usage with the RGB lighting turned off. However, the reviewer highlights several prominent drawbacks, most notably the flat, chiclet-style keycaps. Because the keycaps lack proper contouring and are spaced closely together along a flat plane, they frequently cause typos and accidental double-key presses, requiring a long adjustment period. Connectivity is another mixed bag; while it successfully pairs with multiple devices using three onboard Bluetooth 4.0 channels, the reviewer experienced severe latency and dropouts when pairing it with certain laptops. Other cons include its high price tag, a lack of adjustable typing angles...

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 exceptional battery longevity when the power-hungry RGB illumination is disabled are also heavily praised. Conversely, the cons focus largely on form-factor sacrifices. Users must adapt to a steep learning curve since mandatory shortcuts replace missing hardware keys. Additionally, the compact nature means the keyboard lacks retractable feet to adjust typing angles, it produces the characteristically louder "clickety-clack" acoustics of a mechanical keyboard, and battery life is reduced to just a couple of hours if gaming with full RGB animations active.

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 switches and vivid, highly customizable RGB lighting that can be adjusted via onboard software or direct keyboard shortcuts. Pros & Cons Pros: Extreme Portability: The compact, thin profile allows it to slide easily into small backpack pockets. Versatile Connectivity: It operates seamlessly in both wired and wireless Bluetooth modes. Dedicated Layout Additions: Unlike many 60% competitors, it retains physical arrow keys and a dedicated power switch. Robust Hardware Controls: Deeply customizable RGB lighting and macros can be managed directly from the keyboard without relying entirely on software. Cons: Frustrating Layout Compromises: The tiny right Shift key and the awkward placement of the Delete key beneath the Enter key cause frequent typing errors. Flat Profiles: The chiclet-style flat caps make blind...

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 serves as an excellent companion for mobile writing, gaming, or as a remote control for home theater PCs. Its multi-device capabilities allow it to pair with up to three different devices simultaneously via Bluetooth 4.0. The keyboard boasts significant pros, most notably its exceptional battery life, which is advertised to last up to four months with the lighting turned off. Users will also benefit from its comfortable, slightly contoured keycaps and the flexibility to transition into wired mode to continue working while charging. On the cons side, the unique 60% form factor may initially require an adjustment period for anyone unaccustomed to compact or laptop-style layouts, though it closely mimics a standard ThinkPad setup. Additionally, enabling the per-key RGB lighting heavily drains the...

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 functions. Drawbacks highlighted in the review include the $119 price point, which sits higher than basic mini Bluetooth alternatives. Despite the cost and the necessary adjustment to the small form factor, it is presented as a solid, long-term investment for users seeking a high-quality, travel-friendly keyboard. GeekDad

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 high-end hardware, including a 32-bit ARM Cortex processor and 512KB of onboard memory to handle complex macros and RGB lighting effects without needing external software. Performance-wise, it shines in gaming due to its space-saving design, though the flat keycaps and compact layout require a significant adjustment period for daily typing. Pros and Cons Pros: Extensive Feature Set: Includes on-the-fly macro recording, multiple profiles, and full RGB customisation. Build & Portability: Extremely lightweight (424g) and compact, featuring a premium aluminum top plate and a velvet travel bag. Connectivity: Offers seamless switching between three Bluetooth devices and a wired mode with a detachable USB-C cable. Cons: Steep Learning Curve: The shrunken right Shift key and lack of dedicated arrow/command keys can lead...