Xiaomi Mijia Omni M40

Name: Xiaomi Mijia Omni M40
Brand: Xiaomi
SKU: 95618

Manufacturer: Xiaomi

The Xiaomi Mijia Omni M40 is a fully autonomous robot vacuum cleaner that handles both vacuuming and mopping in a single unit. It supports automatic dust emptying into its docking station, meaning the bin is cleared without any manual intervention, and it can go up to an estimated 75 days before the station itself needs attention. Mapping, no-go zones, scheduled cleaning, and smartphone control are all built in, giving users a fairly complete set of tools to manage how and when the robot operates.

On the technical side, the M40 delivers 12000 Pa of suction power across four cleaning modes and is rated for all floor types. Its 5200 mAh battery supports up to 130 minutes of runtime per charge, and the robot draws 55W during operation. The mopping system includes water level adjustment, mop raising, and mop drying functions. Filtration is handled by a HEPA and allergy filter combination, and the 0.45-litre dustbin uses bags. The unit weighs 3850 g and measures 350 × 350 × 98 mm, and it connects via Wi-Fi with support for both Google Assistant and Amazon Alexa. A two-year warranty is included.

Pros

The self-emptying docking station can go up to an estimated 75 days between emptying cycles, reducing how often the bin needs manual attention
Mop raising, mop drying, and water level adjustment make the mopping system notably more capable than basic wet-cleaning setups
12000 Pa of suction across four cleaning modes gives it meaningful flexibility when tackling different cleaning tasks
Both a HEPA filter and an allergy filter are included, which is useful for households sensitive to dust and allergens
At just 98 mm tall, the robot sits low enough to reach under most standard furniture
Twin side brushes help pull debris from edges and corners more effectively than a single-brush arrangement

Cons

Operating noise is rated at 65 dB, which is relatively audible and may be noticeable in quieter environments
The battery is not removable, so there is no option to extend a cleaning session by swapping in a fresh pack
Voice prompts are absent, meaning the robot provides no spoken feedback during operation
The docking station has a large footprint at over 91000 cm³, which requires a dedicated and reasonably spacious floor area
No dirt sensor is included, so the robot cannot automatically intensify cleaning in areas with heavier soiling

Who is this for?

This robot vacuum works well for users who want a largely hands-off cleaning routine, thanks to its self-emptying station with an estimated 75-day cycle and full scheduling and auto-docking support. Households with mixed floor types will benefit from its ability to clean all surfaces combined with a capable mopping system that includes mop raising, drying, and water adjustment. It is also a reasonable fit for allergy-sensitive households, given the presence of both a HEPA filter and an allergy filter. The low 98 mm profile allows it to clean under furniture that many taller units cannot reach, and Wi-Fi connectivity with support for Google Assistant and Alexa suits users who prefer voice-integrated smart home control.

Who is this NOT for?

Users in noise-sensitive environments — such as those with young children napping or people working from home in quiet spaces — may find the 65 dB operating noise disruptive during cleaning cycles. The large docking station footprint of over 91000 cm³ makes it a poor fit for small apartments or rooms with limited floor space, where finding a suitable permanent location for the base could be challenging. Additionally, those who prefer a robot that provides spoken status updates during operation will find the absence of voice prompts a noticeable gap, since the unit offers no audible feedback on its cleaning progress or errors.

General info:

has HEPA filter	✓
audible noise	65 dB
has an allergy filter	✓
compatible with Google Assistant	✓
works with Alexa	✓
weight	3850 g
width	350 mm
height	98 mm
thickness	350 mm
volume	12005 cm³
warranty period	2 years
estimated empty time	75 days
docking station size	91363.44 cm³

The Xiaomi Mijia Omni M40 measures 350 × 350 mm with a height of just 98 mm and a total volume of 12005 cm³, while the docking station occupies a considerably larger 91363.44 cm³. The unit weighs 3850 g and is covered by a 2-year warranty. Filtration is handled by both a HEPA filter and an allergy filter, making it suitable for households with sensitivities to dust and allergens. Audible noise during operation is rated at 65 dB, and the robot is compatible with Google Assistant and Amazon Alexa for voice control integration. The station is designed to go up to an estimated 75 days between emptying cycles.

Features:

has mapping	✓
supports no-go zones	✓
supports a remote smartphone	✓
has an obstacle sensor	✓
has problem area cleaning	✓
is self-emptying	✓
has carpet detection	✓
doesn't get stuck	✓
has route mapping	✓
Has voice prompts	✕
auto docking	✓
has anti-fall sensor	✓
can be scheduled	✓
has a remote control	✓
has water level adjustment	✓
supports Wi-Fi	✓
has mop cleaning	✓
has mop raising	✓
has mop drying	✓

The M40 comes equipped with a thorough set of navigation and automation features, including mapping, route mapping, no-go zones, and an obstacle sensor that helps it move around the home without getting stuck or falling off edges. It supports scheduled cleaning, auto docking, and remote control via smartphone over Wi-Fi, giving users flexible ways to manage cleaning sessions. Carpet detection and problem area cleaning allow it to adapt its behavior to different floor conditions, while the anti-stuck system keeps it moving reliably. On the mopping side, the robot includes mop cleaning, mop raising, and mop drying functions, along with water level adjustment for more controlled wet cleaning. Self-emptying is also supported, so the dustbin is cleared automatically after each run. Voice prompts are not available on this model.

Design:

dustbin capacity	0.45 l
Has a display	✕
has twin side brushes	✓
automatically adjusts its height	✓
Indicates when full	✓
uses bags	✓

The M40 has a 0.45-litre dustbin that uses bags rather than a bagless collection system, and a full-bin indicator is included to let users know when it needs attention. Twin side brushes help sweep debris from edges and corners into the cleaning path, and the robot automatically adjusts its height to accommodate different floor surfaces. There is no built-in display on the unit itself.

Cleaning power:

suction power	12000 Pa
cleans all floor types	✓
cleaning modes	4
mops	✓
has a dirt sensor	✕
Has an electrostatic filtration system	✕

The M40 delivers 12000 Pa of suction power and is capable of cleaning all floor types, with four selectable cleaning modes to adjust how it operates. Mopping is supported alongside vacuuming, giving it a dual-function cleaning capability. The unit does not include a dirt sensor or an electrostatic filtration system.

Power:

battery power	5200 mAh
runtime	130 min
operating power consumption	55W
has a removable battery	✕

The M40 is powered by a 5200 mAh battery that supports up to 130 minutes of runtime per charge, and operating power consumption is rated at 55W. The battery is not removable, so the unit returns to its docking station to recharge rather than allowing for a quick battery swap.

Final Verdict

The Xiaomi Mijia Omni M40 is a well-specified robot vacuum that covers most of what a modern autonomous cleaning setup requires — strong suction, combined vacuuming and mopping, smart home integration, and a self-emptying station capable of going up to 75 days between cycles. Its dual filtration system, low-profile build, and comprehensive mop management features make it a practical choice for households that want genuine automation with minimal upkeep. Some trade-offs exist around noise levels and the considerable space the docking station demands, and the lack of voice prompts or a dirt sensor are worth noting for users who expect those as standard. Overall, the M40 is a capable and feature-rich option within its category, best suited to larger homes where its full range of navigation and cleaning capabilities can be properly utilized.