DREAME X40 Ultra Review | 118 Data compared

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  • Avg. price in UK: ~£460
  • Avg. price in US: ~$600
  • Max suction power: 12000 Pa
  • Runtime: 194 min
  • Dustbin capacity: 300 mL
  • Max threshold height: 22 mm

DREAME X40 Ultra review. Compare 118 technical specifications and user reviews to see how this product ranks in the Robot Vacuums category and whether it is worth buying.

8.6

Overall score

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

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

Score components:

80.0%

8.6

Technical Score

20.0%

8.7

User score

Excellent
8.6

Technical Score

What it is: An assessment of robot-vacuum performance across cleaning, navigation, mopping, battery life, filtration, brush design, smart features, and dimensions.

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

Score components:

30.0%

9.2

Cleaning

23.0%

9.4

Navigation

18.0%

8.8

Mopping

12.0%

7.7

Battery

10.0%

9.8

Smart Features

7.0%

2.8

Design

Excellent
8.7

User score

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

When it matters: When you want to know how a robot vacuum handles daily tasks and how reliable it remains over time according to user feedback.

Score components:

70.0%

8.1

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.1
(797)
amazon
4.2
(163)
amazon
4.0
(95)
amazon
4.1
(94)
United States
Amazon_logo.png
4.0
(901)
Amazon_logo.png
4.1
(98)
Amazon_logo.png
4.0
(67)

(Reviews last updated: July 2026)

Excellent
  • 7.8
    Mopping

    Score components:

    35.0%

    7.6

    Mopping system type

    25.0%

    10

    Mop lifting

    20.0%

    10

    Auto water refill

    20.0%

    3.4

    Water tank capacity

  • 8.9
    Pet homes

    Score components:

    35.0%

    10

    Anti-tangle technology

    30.0%

    10

    Max suction power

    20.0%

    10

    Carpet boost

    15.0%

    2.9

    Dustbin capacity

  • 8.5
    Navigation and mapping

    Score components:

    30.0%

    8.5

    Primary navigation technology

    30.0%

    10

    Obstacle avoidance technology

    20.0%

    4.6

    Object recognition

    20.0%

    10

    Real-time mapping

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Best prices in UK

Best rankings

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

Verdict

The Dreame X40 Ultra is a flagship robot vacuum and mop that delivers a market-leading 12,000 Pa of Vormax suction power alongside an advanced 6,400 mAh battery providing up to 198 minutes of runtime. It distinguishes itself with SideReach and MopExtend RoboSwing technologies, which utilize a liftable, extendable side brush and a swing-out rotating mop pad to clean deep into corners and within 0.04 inches of edges. Main pros include its fully automated base station that empties a 300 mL onboard dustbin into a 3.2 L bag, refills an 80 mL internal water tank from a 4.5 L reservoir, and washes the mops with 158°F (70°C) hot water before auto-drying them with hot air. Additionally, it offers exceptional AI-driven RGB and 3D structured light obstacle avoidance capable of recognizing over 120 distinct items, and it can automatically lift its mops 10.5 mm or detach them entirely at the dock to keep carpets dry. However, major cons include its very high retail price, its failure to capture significant amounts of pet hair with the standard rubber brush, and the bulky footprint of its base station, which stands nearly 24 inches tall.

Technical Specifications of robot vacuum DREAME X40 Ultra

Technical Score

What it is: An assessment of robot-vacuum performance across cleaning, navigation, mopping, battery life, filtration, brush design, smart features, and dimensions.

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

Score components:

30.0%

9.2

Cleaning

23.0%

9.4

Navigation

18.0%

8.8

Mopping

12.0%

7.7

Battery

10.0%

9.8

Smart Features

7.0%

2.8

Design

8.6
DREAME X40 Ultra has a technical score of 8.59, higher than that of 93.7% of robot vacuums.
User score

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

When it matters: When you want to know how a robot vacuum handles daily tasks and how reliable it remains over time according to user feedback.

Score components:

70.0%

8.1

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.1
(797)
amazon
4.2
(163)
amazon
4.0
(95)
amazon
4.1
(94)
United States
Amazon_logo.png
4.0
(901)
Amazon_logo.png
4.1
(98)
Amazon_logo.png
4.0
(67)

(Reviews last updated: July 2026)

8.7
DREAME X40 Ultra has a user score of 8.66, higher than that of 81% of robot vacuums.
Popularity
What it is: An indicator based on the number of reviews received by the robot vacuum.
When it matters: When you prefer to purchase a product chosen and reviewed by many other consumers.
10
DREAME X40 Ultra has a popularity of 10 points, which is higher than 68.1% of products in this category.
Ratio quality/price

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

When it matters: When you are looking for a robot vacuum with a good balance between quality and price.

Score components:

60.0%

8.6

Overall score

40.0%

8.1

Price

8.5
DREAME X40 Ultra has a quality-to-price ratio of 8.5 points, which is higher than 95.3% of products in this category.
Max suction power
What it is: Maximum suction power is the highest pressure the vacuum motor is rated to produce, measured in pascals.
When it matters: Higher figures can help lift embedded debris from carpet, but brush design and airflow also determine real cleaning performance.

Importance: HIGH

12,000 Pa
DREAME X40 Ultra delivers 12,000 Pa of suction power, which is stronger than that of 89.7% of robot vacuums and equal to that of 1.3% of robot vacuums.
N. of suction power levels
What it is: The number of suction levels shows how many power settings can be selected.
When it matters: More levels give finer control over noise, battery use and cleaning strength on different floors.

Importance: MEDIUM

5
DREAME X40 Ultra has a suction-level count of 5, which is higher than that of 93.6% of robot vacuums and the same as that of 6.2% of robot vacuums.
Motor type
What it is: Motor type identifies whether the suction motor uses a brushed or brushless design.
When it matters: Brushless motors generally offer better efficiency and durability, although complete airflow design still determines performance.

Importance: LOW

brushless
DREAME X40 Ultra uses a motor type considered more efficient than those in 2.7% of robot vacuums and matched by 97.3% of robot vacuums.
Power
What it is: Power is the electrical input rating of the robot or its charging system.
When it matters: It describes energy demand, but it should not be treated as a direct measure of suction or floor-cleaning ability.

Importance: LOW

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Cleaning modes
What it is: Cleaning modes are the distinct automatic or targeted cleaning programs available on the robot.
When it matters: A wider choice makes it easier to match cleaning behavior to rooms, spills, edges or quiet periods.

Importance: MEDIUM

5
DREAME X40 Ultra offers 5 cleaning modes, which is more than 85.9% of robot vacuums and as many as 6.2% of robot vacuums.
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Mopping capability
What it is: Mopping capability means the robot can wipe hard floors with a damp pad or active mop system.
When it matters: It is useful for fine dust and light marks, but it does not automatically mean the robot can replace deep manual mopping.

Importance: MEDIUM

yes
DREAME X40 Ultra can mop floors. This feature is available on 78.9% of robot vacuums.
Mopping system type
What it is: The mopping system type describes how the robot applies motion and pressure to its mop, such as a static pad, vibrating pad, rotating pads or roller.
When it matters: Active systems generally scrub dried marks better, while pad lifting and dock washing determine how practical they are on mixed floors.

Importance: HIGH

rotating pads
DREAME X40 Ultra uses rotating pads for mopping, a system that is more effective than those in 79.6% of robot vacuums and matched by 16% of robot vacuums.
Mop pad type
What it is: Mop pad type describes the pad shape and attachment used by the mopping system.
When it matters: It affects floor contact, edge reach, replacement availability and whether the pads can be washed easily.

Importance: LOW

circular
Mop pad material
What it is: Mop pad material is the fabric or fibre used to wipe and absorb dirt from the floor.
When it matters: It influences absorption, scrubbing action, durability and how easily the pad releases dirt when washed.

Importance: LOW

microfiber
Mop pressure
What it is: Mop pressure is the downward force the mopping system applies to the floor.
When it matters: More controlled pressure can improve removal of dried marks, although pad motion and moisture delivery also matter.

Importance: LOW

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Primary navigation technology
What it is: The primary navigation technology is the main sensor system the robot uses to understand its position and plan a route.
When it matters: It affects route efficiency, coverage and how reliably the robot returns to its dock, especially in larger or more complex homes.

Importance: HIGH

LiDAR
DREAME X40 Ultra uses LiDAR as its primary navigation system, which is more capable than the systems in 34.7% of robot vacuums and matched by 60.4% of robot vacuums.
Mapping capability
What it is: Mapping capability lets the robot create a floor plan instead of cleaning only from moment-to-moment sensor reactions.
When it matters: A saved map is important for room selection, no-go zones and predictable coverage.

Importance: MEDIUM

yes
DREAME X40 Ultra maps the floor. This feature is available on 74% of robot vacuums.
Real-time mapping
What it is: Real-time mapping updates the floor plan and the robot's route while a cleaning run is in progress.
When it matters: It helps you follow progress, spot missed areas and see where the robot is if it becomes stuck.

Importance: LOW

yes
DREAME X40 Ultra updates its map in real time. This feature is available on 68.5% of robot vacuums.
Multiple map storage
What it is: Multiple map storage keeps separate floor plans for more than one level or cleaning area.
When it matters: It is useful in multi-storey homes because the robot does not need to rebuild the map each time it changes floors.

Importance: LOW

yes
DREAME X40 Ultra stores multiple maps. This feature is available on 56.5% of robot vacuums.
Map editing
What it is: Map editing lets you divide, merge, name and adjust rooms in the app.
When it matters: Accurate room boundaries make room-by-room schedules and targeted cleaning easier to use.

Importance: LOW

yes
DREAME X40 Ultra lets you edit maps. This feature is available on 63.9% of robot vacuums.
Grounded yes from data_scrape2/data_scrape4 (agreement or one clear yes with other source empty/noisy).
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App control
What it is: App control lets you operate and configure the robot from a smartphone application.
When it matters: It is needed for maps, room selection, schedules and many advanced settings on modern robot vacuums.

Importance: LOW

yes
DREAME X40 Ultra supports app control. This feature is available on 94.4% of robot vacuums.
App name
What it is: App name identifies the manufacturer's mobile application used to control the robot.
When it matters: It helps you check phone compatibility, account requirements and user feedback for the correct app before buying.

Importance: LOW

Dreamehome
Wi-Fi connectivity
What it is: Wi-Fi connectivity links the robot to its app and cloud services through the home network.
When it matters: It enables remote control and updates, but setup quality depends on router compatibility and signal coverage.

Importance: LOW

yes
DREAME X40 Ultra connects to Wi-Fi. This feature is available on 93.7% of robot vacuums.
Supported Wi-Fi bands
What it is: Supported Wi-Fi bands identify the wireless frequencies the robot can use, commonly 2.4 GHz and sometimes 5 GHz.
When it matters: Band support matters during setup because many robot vacuums connect only to a 2.4 GHz network.

Importance: LOW

2.4 GHz
Bluetooth connectivity
What it is: Bluetooth connectivity provides a short-range wireless link, often used during initial setup.
When it matters: It can simplify pairing but usually does not replace Wi-Fi for remote app control.

Importance: LOW

yes
DREAME X40 Ultra connects via Bluetooth. This feature is available on 64.5% of robot vacuums.
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Battery capacity
What it is: Battery capacity is the amount of electrical charge the battery can store, measured in milliamp-hours.
When it matters: More capacity can support longer cleaning runs, but motor power, mopping and navigation also affect actual runtime.

Importance: MEDIUM

6,400 mAh
DREAME X40 Ultra has a battery capacity of 6,400 mAh; it is higher than that of 94% of robot vacuums and equal to that of 6% of robot vacuums.
Grounded current sources converge on 6400 mAh battery capacity.
Battery type
What it is: Battery type identifies the battery chemistry used by the robot.
When it matters: It affects weight, service life and charging behavior, with lithium-ion now being the common modern design.

Importance: LOW

Li-ion
Battery voltage
What it is: Battery voltage is the nominal electrical voltage of the robot's battery pack.
When it matters: It is mainly useful for checking replacement-battery compatibility and does not by itself indicate runtime.

Importance: LOW

14.4
Runtime
What it is: Runtime is how long the robot is rated to clean on one charge under the stated test mode.
When it matters: Longer runtime matters on large floors, while recharge-and-resume can compensate for a smaller battery.

Importance: MEDIUM

194 min
DREAME X40 Ultra runs for 194 min per charge; this is longer than 77.1% of robot vacuums.
Recharge and resume
What it is: Recharge and resume sends the robot back to charge and then returns it to the unfinished part of the map.
When it matters: It allows large cleaning jobs to finish without manual intervention when one battery charge is not enough.

Importance: LOW

yes
DREAME X40 Ultra resumes cleaning after charging. This feature is available on 83.1% of robot vacuums.
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Shape
What it is: Shape describes the robot's body outline, most commonly round or D-shaped.
When it matters: Shape influences corner reach and manoeuvring, although brush placement and route planning are equally important.

Importance: LOW

round
Height
What it is: Height is the vertical clearance required by the robot.
When it matters: A lower body can clean under more sofas, beds and cabinets, but measure the furniture gap before relying on it.

Importance: LOW

97 mm
DREAME X40 Ultra is 97 mm tall; this is higher than 63.9% of robot vacuums and equal to 8.6% of robot vacuums.
Width
What it is: Width is the side-to-side size of the robot.
When it matters: It determines whether the robot can pass between chair legs, furniture and other narrow spaces.

Importance: LOW

350 mm
DREAME X40 Ultra is 350 mm wide; this is wider than 63.5% of robot vacuums and equal to 20.3% of robot vacuums.
Length
What it is: Length is the front-to-back size of the robot.
When it matters: Together with width and shape, it affects turning space and access around closely placed furniture.

Importance: LOW

350 mm
DREAME X40 Ultra is 350 mm long; this is longer than 62% of robot vacuums and equal to 21.1% of robot vacuums.
Weight
What it is: Weight is the mass of the robot itself, excluding its dock.
When it matters: A lighter robot is easier to carry between floors, while weight has little direct connection to cleaning quality.

Importance: LOW

4.1 kg
DREAME X40 Ultra weighs 4.1 kg; this is more than 75.1% of robot vacuums and equal to 2.5% of robot vacuums.
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DREAME X40 Ultra vs the average robot vacuum

  • 8,000 Pa stronger suction
    DREAME X40 Ultra delivers 12,000 Pa, compared with 4,000 Pa for the average robot vacuum.
    What it is: Maximum suction power is the highest pressure the vacuum motor is rated to produce, measured in pascals.
    When it matters: Higher figures can help lift embedded debris from carpet, but brush design and airflow also determine real cleaning performance.

    Importance: HIGH

    DREAME X40 Ultra delivers 12,000 Pa, compared with 4,000 Pa for the average robot vacuum.12000 Pa vs 4000 Pa
  • Prevents hair tangles
    DREAME X40 Ultra prevents hair tangles, while the average robot vacuum has no anti-tangle system.
    Grounded yes from data_scrape sources: TriCut Brush (compatible accessory)
    What it is: Anti-tangle technology is designed to prevent or remove hair wrapped around the main brush and axles.
    When it matters: It is especially valuable in homes with pets or long hair because it reduces manual brush cleaning.

    Importance: MEDIUM

    DREAME X40 Ultra prevents hair tangles, while the average robot vacuum has no anti-tangle system.
  • Lifts its mop over carpets
    DREAME X40 Ultra lifts its mop over carpets, while the average robot vacuum does not lift its mop automatically.
    The mop lifts by 10.5 mm.
    What it is: Mop lifting raises the mop pads when the robot crosses carpet or returns to its dock.
    When it matters: It helps protect rugs from moisture in homes with both hard floors and carpet.

    Importance: MEDIUM

    DREAME X40 Ultra lifts its mop over carpets, while the average robot vacuum does not lift its mop automatically.
  • Better mopping system
    DREAME X40 Ultra uses rotating pads for mopping, while the average robot vacuum uses static pad.
    What it is: The mopping system type describes how the robot applies motion and pressure to its mop, such as a static pad, vibrating pad, rotating pads or roller.
    When it matters: Active systems generally scrub dried marks better, while pad lifting and dock washing determine how practical they are on mixed floors.

    Importance: HIGH

    DREAME X40 Ultra uses rotating pads for mopping, while the average robot vacuum uses static pad.rotating pads vs static pad
  • 3,200 mAh more battery capacity
    DREAME X40 Ultra has a battery capacity of 6,400 mAh, compared with 3,200 mAh for the average robot vacuum.
    Grounded current sources converge on 6400 mAh battery capacity.
    What it is: Battery capacity is the amount of electrical charge the battery can store, measured in milliamp-hours.
    When it matters: More capacity can support longer cleaning runs, but motor power, mopping and navigation also affect actual runtime.

    Importance: MEDIUM

    DREAME X40 Ultra has a battery capacity of 6,400 mAh, compared with 3,200 mAh for the average robot vacuum.6400 mAh vs 3200 mAh
  • Recognizes more object types
    DREAME X40 Ultra recognizes 120 object types, compared with 0 for the average robot vacuum.
    What it is: Object recognition is the number of object types the robot is designed to identify and avoid.
    When it matters: A broader recognition set is useful in busy homes where small everyday objects are often left on the floor.

    Importance: MEDIUM

    DREAME X40 Ultra recognizes 120 object types, compared with 0 for the average robot vacuum.120 vs 0
  • Empties its dustbin automatically
    DREAME X40 Ultra empties its dustbin automatically, while the average robot vacuum requires manual dustbin emptying.
    What it is: Auto-empty capability lets the dock remove dry debris from the robot's bin after cleaning.
    When it matters: It reduces daily emptying and is especially useful for pet hair, large homes and frequent schedules.

    Importance: LOW

    DREAME X40 Ultra empties its dustbin automatically, while the average robot vacuum requires manual dustbin emptying.
  • Cleans its mop automatically at the dock
    DREAME X40 Ultra cleans its mop automatically at the dock, while the average robot vacuum does not clean its mop automatically at the dock.
    What it is: A self-cleaning dock washes its mop tray, mop pads or both with limited manual work.
    When it matters: It reduces hands-on maintenance, but the dirty-water tank and dock tray still need periodic cleaning.

    Importance: LOW

    DREAME X40 Ultra cleans its mop automatically at the dock, while the average robot vacuum does not clean its mop automatically at the dock.
  • 3,200 mAh more battery capacity
    DREAME X40 Ultra has a battery capacity of 6,400 mAh, compared with 3,200 mAh for the average robot vacuum.
  • 44 min longer runtime
    DREAME X40 Ultra runs for 194 min per charge, compared with 150 min for the average robot vacuum.
  • Supports fast charging
    DREAME X40 Ultra supports fast charging, while the average robot vacuum does not support fast charging.
  • Supports off-peak charging
    DREAME X40 Ultra supports off-peak charging, while the average robot vacuum does not support off-peak charging.
  • 30 m² more cleaning coverage
    DREAME X40 Ultra can clean up to 210 m² per charge, compared with 180 m² for the average robot vacuum.
  • Detects liquid spills
    DREAME X40 Ultra detects liquid spills, while the average robot vacuum does not detect liquid spills.
  • Supports remote camera monitoring
    DREAME X40 Ultra supports remote camera monitoring, while the average robot vacuum does not support camera monitoring.
  • Includes a child lock
    DREAME X40 Ultra includes a child lock, while the average robot vacuum has no child lock.
  • Supports more languages
    DREAME X40 Ultra supports 32 languages, compared with 17 on the average robot vacuum.
  • Recognizes more object types
    DREAME X40 Ultra recognizes 120 object types, compared with 0 for the average robot vacuum.
  • 2 mm greater threshold clearance
    DREAME X40 Ultra climbs thresholds up to 22 mm, compared with 20 mm for the average robot vacuum.
  • 8,000 Pa stronger suction
    DREAME X40 Ultra delivers 12,000 Pa, compared with 4,000 Pa for the average robot vacuum.
  • Prevents hair tangles
    DREAME X40 Ultra prevents hair tangles, while the average robot vacuum has no anti-tangle system.
  • Empties its dustbin automatically
    DREAME X40 Ultra empties its dustbin automatically, while the average robot vacuum requires manual dustbin emptying.
  • Detects dirtier areas
    DREAME X40 Ultra detects dirtier areas, while the average robot vacuum does not detect dirtier areas.
  • 0.97 % Higher filtration efficiency
    DREAME X40 Ultra has a higher filtration efficiency than the average robot vacuum (100% vs 99%).
  • 1 more cleaning modes
    The number of cleaning modes on DREAME X40 Ultra is 5, compared with 4 on the average robot vacuum.
  • 22 mm wider main brush
    DREAME X40 Ultra uses a main brush measuring 200 mm, compared with 178 mm for the average robot vacuum.
  • 1 more suction levels
    The number of suction levels on DREAME X40 Ultra is 5, compared with 4 on the average robot vacuum.
  • 0.2 L larger dust bag
    DREAME X40 Ultra has a 3.2 L auto-empty dust bag, compared with 3 L on the average robot vacuum.
  • Lifts its mop over carpets
    DREAME X40 Ultra lifts its mop over carpets, while the average robot vacuum does not lift its mop automatically.
  • Better mopping system
    DREAME X40 Ultra uses rotating pads for mopping, while the average robot vacuum uses static pad.
  • Cleans its mop automatically at the dock
    DREAME X40 Ultra cleans its mop automatically at the dock, while the average robot vacuum does not clean its mop automatically at the dock.
  • Refills its water tank automatically
    DREAME X40 Ultra refills its water tank automatically, while the average robot vacuum requires manual water refilling.
  • Dries its mop automatically at the dock
    DREAME X40 Ultra dries its mop automatically at the dock, while the average robot vacuum does not dry its mop automatically.
  • Washes its mop with hot water
    DREAME X40 Ultra washes its mop with hot water, while the average robot vacuum does not wash its mop with hot water.
  • 29 more water-flow levels
    The number of water-flow levels on DREAME X40 Ultra is 32, compared with 3 on the average robot vacuum.
  • Dispenses cleaning solution automatically
    DREAME X40 Ultra dispenses cleaning solution automatically, while the average robot vacuum does not dispense cleaning solution automatically.
  • 500 mL more clean-water capacity
    2 mL more clean-water capacity: DREAME X40 Ultra compared with the average robot vacuum.
  • Supports cleaning solution
    DREAME X40 Ultra supports cleaning solution, while the average robot vacuum does not support cleaning solution.
  • 500 mL more dirty-water capacity
    2 mL more dirty-water capacity: DREAME X40 Ultra compared with the average robot vacuum.
  • 3.5 W higher standby use
    DREAME X40 Ultra uses 5.5 W in standby, compared with 2 W for the average robot vacuum.
  • 11 dB louder operation
    DREAME X40 Ultra produces 76 dB of noise, compared with 65 dB for the average robot vacuum.
  • 0.57 kg heavier robot
    DREAME X40 Ultra weighs 4.1 kg, compared with 3.53 kg for the average robot vacuum.
  • 24.7 cm taller base station
    DREAME X40 Ultra has a base station that is 59 cm tall, compared with 34.3 cm for the average robot vacuum.
  • 4.9 kg heavier base station
    DREAME X40 Ultra has a base station that weighs 9.2 kg, compared with 4.3 kg for the average robot vacuum.
  • 16.97 cm deeper base station
    DREAME X40 Ultra has a base station that is 45.7 cm deep, compared with 28.7 cm for the average robot vacuum.
  • 11.35 mm wider body
    DREAME X40 Ultra is 350 mm wide, compared with 338.65 mm for the average robot vacuum.
  • 3 mm taller body
    DREAME X40 Ultra is 97 mm tall, compared with 94 mm for the average robot vacuum.
  • 10 mm longer body
    DREAME X40 Ultra is 350 mm long, compared with 340 mm for the average robot vacuum.
  • 2.45 cm wider base station
    DREAME X40 Ultra has a base station that is 34 cm wide, compared with 31.55 cm for the average robot vacuum.
  • 100 mL smaller dustbin
    DREAME X40 Ultra has a dustbin capacity of 300 mL, compared with 400 mL for the average robot vacuum.
  • 160 mL smaller water tank
    DREAME X40 Ultra has a water tank capacity of 80 mL, compared with 240 mL for the average robot vacuum.
  • 160 mL smaller water tank
    DREAME X40 Ultra has a water tank capacity of 80 mL, compared with 240 mL for the average robot vacuum.
    What it is: Water tank capacity is the amount of mopping water carried inside the robot.
    When it matters: A larger tank can cover more hard floor before refilling, though dock-based automatic refill can reduce this limitation.

    Importance: LOW

    DREAME X40 Ultra has a water tank capacity of 80 mL, compared with 240 mL for the average robot vacuum.80 mL vs 240 mL
  • 100 mL smaller dustbin
    DREAME X40 Ultra has a dustbin capacity of 300 mL, compared with 400 mL for the average robot vacuum.
    What it is: Dustbin capacity is the amount of dry debris the bin inside the robot can hold.
    When it matters: A larger bin needs emptying less often, which matters in homes with pets unless an auto-empty dock is included.

    Importance: MEDIUM

    DREAME X40 Ultra has a dustbin capacity of 300 mL, compared with 400 mL for the average robot vacuum.300 mL vs 400 mL
  • 11 dB louder operation
    DREAME X40 Ultra produces 76 dB of noise, compared with 65 dB for the average robot vacuum.
    What it is: Noise level range shows the sound produced across the robot's operating modes.
    When it matters: Lower noise is helpful for cleaning while people work, talk, sleep or remain at home with noise-sensitive pets.

    Importance: LOW

    DREAME X40 Ultra produces 76 dB of noise, compared with 65 dB for the average robot vacuum.76 dB vs 65 dB
  • 0.57 kg heavier robot
    DREAME X40 Ultra weighs 4.1 kg, compared with 3.53 kg for the average robot vacuum.
    What it is: Weight is the mass of the robot itself, excluding its dock.
    When it matters: A lighter robot is easier to carry between floors, while weight has little direct connection to cleaning quality.

    Importance: LOW

    DREAME X40 Ultra weighs 4.1 kg, compared with 3.53 kg for the average robot vacuum.4.1 kg vs 3.53 kg
  • 24.7 cm taller base station
    DREAME X40 Ultra has a base station that is 59 cm tall, compared with 34.3 cm for the average robot vacuum.
    What it is: Base-station height is the vertical size of the dock.
    When it matters: It determines whether the station fits under shelves or counters and whether its tanks can be removed easily.

    Importance: LOW

    DREAME X40 Ultra has a base station that is 59 cm tall, compared with 34.3 cm for the average robot vacuum.59 cm vs 34.3 cm
  • 3.5 W higher standby use
    DREAME X40 Ultra uses 5.5 W in standby, compared with 2 W for the average robot vacuum.
    What it is: Standby power consumption is the electricity used while the robot or dock is idle but connected to power.
    When it matters: Lower standby use matters because the charging station normally remains plugged in all day.

    Importance: LOW

    DREAME X40 Ultra uses 5.5 W in standby, compared with 2 W for the average robot vacuum.5.5 W vs 2 W
  • 4.9 kg heavier base station
    DREAME X40 Ultra has a base station that weighs 9.2 kg, compared with 4.3 kg for the average robot vacuum.
    What it is: Base-station weight is the mass of the dock without the robot.
    When it matters: A lighter dock is easier to move, while a heavier station may remain more stable during docking and mop washing.

    Importance: LOW

    DREAME X40 Ultra has a base station that weighs 9.2 kg, compared with 4.3 kg for the average robot vacuum.9.2 kg vs 4.3 kg
  • 16.97 cm deeper base station
    DREAME X40 Ultra has a base station that is 45.7 cm deep, compared with 28.7 cm for the average robot vacuum.
    What it is: Base-station depth is how far the dock projects from the wall.
    When it matters: A shallower station uses less floor space and is less intrusive in a hallway or small room.

    Importance: LOW

    DREAME X40 Ultra has a base station that is 45.7 cm deep, compared with 28.7 cm for the average robot vacuum.45.67 cm vs 28.7 cm

Graphic comparison of DREAME X40 Ultra and other robot vacuums

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Third-party reviews

What customers like about DREAME X40 Ultra?

  • Exceptional 12,000Pa suction power that lifts fine dirt, pet hair, and large debris effortlessly from hard floors.
  • Innovative auto-extending side brush and mop heads that thoroughly clean tight corners, furniture legs, and skirting boards.
  • Outstanding mopping performance capable of removing dried-on liquid stains rather than just surface-wiping.
  • Advanced AI camera and 3D structured light system providing nearly perfect obstacle avoidance and rapid house mapping.
  • Highly automated base station that auto-empties dirt, washes pads with 70°C/80°C hot water, and dries them with hot air.
  • Intelligent floor management that automatically lifts mop pads or detaches them magnetically at the base station to keep carpets completely dry.
  • Long-lasting 6,400 mAh battery life that comfortably handles large floor plans on a single charge.
  • Deep customisation options in the companion app allowing users to fine-tune suction levels and water wetness for individual rooms.

What customers dislike about DREAME X40 Ultra?

  • Extremely high initial premium price tag and expensive ongoing maintenance costs for official replacement parts and solutions.
  • The standard main rubber roller brush easily tangles with longer human and pet hair, requiring manual cutting.
  • The automated base station is exceptionally large and bulky, taking up a significant amount of physical floor space.
  • Occasional software glitches, unoptimized cleaning paths on initial runs, and a steep learning curve with the mobile application.
  • The auto-empty suction mechanism in the base station can occasionally fail to completely clear damp debris from the on-board robot bin.
  • Buggy automatic carpet recognition on 'Clean Genius' mode that occasionally attempts to mop low-pile carpets instead of lifting the pads.
  • Inconsistent customer support responsiveness from the manufacturer when addressing hardware defects or loss of airflow.
  • The side brush historically deactivates and stops spinning entirely when operating on carpeted surfaces.

Expert reviews

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vacuumwars.com
10/06/2024
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techradar.com
02/01/2025
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everydayhomecomfort.com
16/06/2026
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techgearlab.com
21/06/2025
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robotobzor.com
15/12/2024
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im.com.au
18/07/2024
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galaxus.at
09/10/2024
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galaxus.ch
09/10/2024
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community.heyupnow.com
31/05/2024
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chip.de
17/04/2024
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C
connect.de
07/05/2024
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nextpit.de
22/05/2024
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heise.de
27/06/2024
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galaxus.ch
09/10/2024
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imtest.de
28/11/2024
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S
smart-home-fox.de
15/09/2025
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C
computerbild.de
05/08/2024
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C
chip.de
17/04/2024
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F
frandroid.com
27/04/2024
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C
charlestech.fr
10/05/2024
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lesnumeriques.com
04/06/2024
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G
galaxus.fr
09/10/2024
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presse-citron.net
29/06/2024
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M
meilleur-robot-aspirateur-laveur.fr
14/07/2024
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C
capital.fr
22/08/2024
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D
darty.com
15/10/2024
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G
gamereactor.es
01/10/2024
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lacasasibarita.es
Sin fecha específica
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andreagaleazzi.com
30/04/2024
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smartworld.it
28/05/2024
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corriere.it
27/08/2024
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G
galaxus.it
09/10/2024
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global.techradar.com
13/01/2025
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tuttoandroid.net
04/06/2024
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bright.nl
19/04/2024
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spotontech.nl
15/07/2024
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id.nl
14/05/2024
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tweakers.net
05/02/2025
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Video reviews

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