Robot vacuums / Compare

Dreame L40s Ultra vs Roborock Qrevo Curv 2 Flow

A

Product A: Dreame

L40s Ultra

65 of 89 known

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B

Product B: Roborock

Qrevo Curv 2 Flow

70 of 89 known

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Every value links to where we found it.

Only differences

ADreame L40s Ultra

BRoborock Qrevo Curv 2 Flow

General

6 of 7 differ

Series

L Series1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Listed in the L Series menu of the Dreame US store. The L40s family has three models, L40s Ultra, Ultra AE and Ultra CE, with different hardware

Qrevo Curv10Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-announcementRead 14 October 2026The newest model in the Qrevo Curv family after the Curv, CurvX and Curv S5X

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

RLL22SE, 010204AA000742, 010204AA0008231Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026US store SKUs 010204AA000742 (White) and 010204AA000823 (Black). RLL22SE is the robot model code from SmartHomeCompared and a reseller copy of the user manual. No maker page states it8Spec databasesmarthomecompared.com/robot-vacuums/dreame-l40s-ultraRead 15 October 2026SmartHomeCompared lists Model RLL22SE and Launch Year 2025

RRE0BEL, RR-QrevoCurv2Flow0-M1, RRDE-QrevoCurv2Flow0-M1, QC2F02-001Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026US store SKU RR-QrevoCurv2Flow0-M13Maker product pagede.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026German store SKU RRDE-QrevoCurv2Flow0-M16Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026Robot model RRE0BEL, dock EWFD53LRR (FCC and IC statement)7Owner's manualgl-files.roborock.com/product/center/images/v69660e28ac3eb.pdfRead 14 October 2026CE manual: robot RRE0BEL, dock EWFD53HRR14Retailer pagepood.datafox.ee/mobiilseadmed-ja-tarvikud/robottolmuimejad/vacuum-cleaner-robot-qrevo-curv-2-flow-qc2f02-00Read 14 October 2026Datafox lists MPN QC2F02-00 for the Qrevo Curv 2 Flow

GTIN / EAN

00850070805063, 008500708050701Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Barcodes 00850070805063 (White) and 00850070805070 (Black) in the US store variant data

0195043008608, 69369059048051Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026GTIN 0195043008608 in the US page structured data3Maker product pagede.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026GTIN 6936905904805 in the German page structured data

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

13 August 20252Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Article date 2025-08-13

October 202512Press articlecravingtech.com/roborock-launches-f25-ultra-and-qrevo-curv-2-flow-in-australia-just-in-time-for-christmas.htmlRead 14 October 2026Roborock AU launch article dated 2025-10-17 introduces the Qrevo Curv 2 Flow with an RRP of A$2,499

Status

Available2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Sold at the Dreame US store and Amazon in October 2026

Available11Press articletech.yahoo.com/home/articles/roborock-unveils-first-ever-robot-090000128.htmlRead 14 October 2026Sold on the maker's US and German stores in October 2026

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$1,399.991Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026US store regular price $1,399.99, sale price $569.99. Excludes tax2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026L40s Ultra MSRP $1,399.99. L40s Ultra AE $1,099.99 and CE $899.99

$999.991Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Regular price $999.99 on the maker's US store, sale price $699.99. Excludes tax

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

€8993Maker product pagede.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026German store compare-at price 899 EUR incl. VAT. The current sale price is lower, so it is not used

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026US store

US, DE1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026US store

ColoursiThe maker's own colour names

White, Black1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Variant options White and Black

White4Maker product pageroborockstore.com.au/products/qrevo-curv-2-flowRead 14 October 2026Spec table: Colour White

Suction and brushes

9 of 13 differ

Max suction (claimed)iThe maker's highest suction pressure claim in pascals. Each maker measures it in its own lab, so figures from different brands are not directly comparable. A claim such as "175x more suction" is not converted. A maker can claim another figure in another market, such as Roborock in the US, so it is per variant.

19,000Pa1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 202619,000Pa Vormax suction, in-house lab data

20,000Pa1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 202620,000 Pa HyperForce suction, internal testing per the maker's footnote

Suction power (claimed)iThe maker's suction power claim in air watts. Few robot makers publish it. Pascals are a different measure and go in Max suction.

Not available

Not available

Main brushesiNumber of main brush rolls under the robot. One roll split into two halves counts as one, and so do two cones tip to tip on one axis. Two rolls that turn against each other count as two.

21Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026The HyperStream Detangling DuoBrush has two rolls, a bristled rubber brush and a TPU rubber brush. The maker's comparison blog calls them counter-rotating rollers

19Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026DuoDivide rubber main brush with a center gap to channel hair. One roll split into two halves counts as one. The manual lists main brushes in the plural

Main brush materialiMaterial of the main brush rolls. Rubber covers rubber blades and fins.

Rubber and bristle1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Rubber brush with bristles plus a TPU all-rubber brush

Not available

Main brush (as published)iThe maker's name for the main brush, such as "DuoDivide Brush".

HyperStream Detangling DuoBrush1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026

DuoDivide1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026DuoDivide main brush

Main brush liftiThe robot can raise its main brush off the floor, for example while it mops.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026The comparison table marks Main Brush Lifting absent for the L40s Ultra and present for the AE and CE. The spec table has no such row. The comparison blog says the mops lift and the brush stays down

Yes2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026For spills and wet stains the robot switches to mop-only mode and lifts both the side brushes and the main brush

Side brushesiSpinning edge brushes. 0 for a robot without one.

11Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026The in-box list has one side brush. The maker's comparison blog says all L40 models use one side brush

22Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Dual Anti-Tangle System: a main brush and dual side brushes (Dual Lifting Arc Side Brushes)9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026Two spinning side brushes instead of one

Extending side brushiThe side brush or its arm swings outward to reach corners and wall edges. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Side Brush Extending yes

No8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Compare page lists Extending Side Brush: No. The review says neither side brush extends outward9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026Both side brushes lift to avoid wet messes but neither extends outward

Side brush liftiThe robot can raise its side brush off the floor.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Side Brush Lifting yes

Yes2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Dual Lifting Arc Side Brushes, lifted in mop-only mode

Max carpet pile (claimed)iTallest carpet pile the maker says the robot can clean. It is not the threshold height the robot can climb. A carpet height the robot climbs onto or glides over, such as carpet climbing 3 cm, is not a pile height.

Not available

Not available

Robot dustbiniDust capacity of the bin inside the robot. The base station's bag or bin is listed separately.

310mL1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Dust Box Capacity 310ml. The comparison table says at least 300ml

324mL4Maker product pageroborockstore.com.au/products/qrevo-curv-2-flowRead 14 October 2026Spec table: Dustbin Volume 324ml. Vacuum Wars lists 324 ml in its compare table and 325 ml in the review text

FilteriPublished filter type or grade, such as "E11 HEPA". The robot's own filter. A dock filter goes in the source note.

Not available

Not available

Washable filteriThe maker says the filter can be rinsed with water.

Not available

Yes6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026Parts list names A7-6 Washable Filter

Navigation and obstacles

7 of 8 differ

NavigationiHow the robot maps the home. A turret is a raised laser sensor on top. A retractable turret sinks into the body to pass under furniture. Built-in lidar sits inside the body with no turret. A solid-state 3D ToF sensor without a turret counts as built-in lidar. Camera means visual mapping without lidar. Gyroscope only means the robot has no mapping sensor and cleans in rows with a gyroscope. Random bounce means the robot has no mapping sensor and no gyroscope and turns when it bumps into something.

Lidar turret1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Pathfinder Smart Navigation. The comparison table lists navigation LDS, a laser distance sensor. The height of 97 mm includes the turret, as for the other L Series models

Lidar turret9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026Top-mounted spinning LiDAR instead of the retracting system of the CurvX

Navigation system (as published)iThe maker's name, such as "VersaLift DToF" or "ClearView Pro LiDAR".

Pathfinder Smart Navigation (LDS)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026

PreciSense LiDAR Navigation2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026PreciSense LiDAR Navigation System

Obstacle sensors (as published)iThe maker's description of the front obstacle sensors, such as "AI Camera x2 + LED".

Single-Laser 3D Structured Light (3DAdapt)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Comparison table: Single-Laser 3D Structured Light. The spec table says 3D Structured Light

Reactive AI Obstacle Recognition with structured light and RGB camera1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Reactive AI Obstacle Recognition: structured light and an RGB camera

AI object recognitioniA camera and software identify objects such as cables, socks and pet waste and steer around them. A structured light sensor without a camera counts when the maker says it identifies object types, as Narwal does. A bump sensor or infrared sensor alone does not qualify. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Comparison table: the L40s Ultra has single-laser structured light only, with RGB AI listed for the AE. The maker's comparison blog says it detects obstacles by shape and depth without identifying them

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026

Object types recognized (claimed)iNumber of object types the maker says the robot can identify. A figure such as 300+ is stored as 300.

Not available

2001Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Published as over 200 types. Objects should be wide 5 cm or more and tall 3 cm or more

Dirt detectioniA sensor or camera finds dirtier spots and the robot cleans them harder or again. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Comparison table: Dirt Detection and AI Dirt Detection are marked absent for the L40s Ultra

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026AI dirt recognition identifies the type of mess and adapts the cleaning2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026DirTect Technology: AI dirt recognition boosts suction for dust and switches to mop-only for wet stains

Max threshold (claimed)iHighest single step or door threshold the maker says the robot can climb.

22mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20260.87 in (22 mm) single-layer step with the auxiliary wheels. In-house lab data2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Footnote: for a single-layer step the maximum height is 22mm

20mm8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Hardware and Official Specs: Threshold Climbing Height 20 mm. The review says the robot is limited to standard 20 mm crossings

Max two-step threshold (claimed)iHighest total height of a two-step threshold the maker says the robot can climb, such as a stepped sliding door track. Makers set conditions, such as a minimum width of the lower step.

40mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20261.57 in (40 mm) double-layer step where the gap between the two layers is more than 1.18 in (30 mm). In-house lab data2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 202640mm is the height of a double-layer step where the gap between the two layers exceeds 3cm

Not available

Mopping

5 of 8 differ

Mop typeiNone means the robot only vacuums. Spinning pads are round pads that rotate. A roller is a turning cylinder. A track is a belt-shaped mop that rolls over the floor. A vibrating pad moves back and forth. A static pad is dragged.

Spinning pads1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dual Spinning Mops

Roller1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026SpiraFlow real-time self-cleaning roller mop, 270 mm wide

Extending mopiA mop pad or roller moves outward to reach wall edges and under low furniture. False only when the maker or a spec table says the feature is absent. Silence is a missing value.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Mop Extending yes

Yes1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Edge-Adaptive Roller Mop cleans within about 10 mm of wall edges2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Edge-Adaptive Roller Mop extends to clean within 10 mm of edges. The AU store says up to 43 mm extension

Mop lift heightiHow far the robot raises its mop pads alone when it drives onto carpet, as the maker's spec table gives it. A lift with the raised chassis goes in the source note.

10.5mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20260.41 in (10.5 mm), the height between the ground and the lifted pads. Footnote: based on in-house lab data

15mm1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Roller lifts up to 15 mm when a carpet is detected and a roller shield deploys10Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-announcementRead 14 October 202615 mm roller lift on carpet with an automatic roller shield

Leaves mop at the dockiThe robot drops its mop pads at the base station by itself and picks them up again, so it can vacuum carpet without them.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Mop Removal yes. Comparison table: Mop Automatic Removal yes. Mops are removed for long-pile carpets

Not available

Mop downforce (claimed)iThe maker's claim for the force that presses the mop onto the floor. A claim in kilograms is converted at 1 kgf = 9.80665 N and rounded to one decimal, so 1 kg is 9.8 N. When the maker also gives a figure in N, that figure is stored. When the maker gives a range, such as 9-11 N, the top of the range is stored.

Not available

15N1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Up to 15 N downward pressure, internal testing10Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-announcementRead 14 October 202615 N, about 2.5 times the original Curv's 6 N

Mop speed (claimed)iHighest rotation speed of the spinning pads or the mop roller that wipes the floor. The speed of another roller that does not wipe the floor is not stored here.

Not available

220rpm2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Roller spins at 220 RPM. Footnote: the maximum speed with extreme water flow in custom mode, internal testing10Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-announcementRead 14 October 2026270 mm roller mop spinning at 220 RPM

Robot water tankiClean water held in the robot itself. The base station tanks are separate.

Not available

Not available

Water flow levelsiNumber of water flow settings the user can pick for mopping.

Not available

Not available

Base station

7 of 10 differ

Base stationiThe main jobs of the dock sold with this model. Auto-empty means the dock sucks the dust out of the robot. Mop washing means the dock cleans the mop.

Auto-empty and mop washing1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dock empties the dust box, washes the mop pads and dries them

Auto-empty and mop washing1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Multifunctional dock with auto emptying into a disposable dust bag and roller mop washing and drying

Base station featuresiExtra dock functions. Hot-air drying dries the mop with warm air. Auto detergent adds cleaning solution by itself. Robot tank refill fills the robot's water tank. Self-cleaning wash tray means the dock cleans its own mop washing tray.

Hot-air drying, Auto detergent, Robot tank refill, Self-cleaning wash tray1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Hot Air Drying, Auto Solution Adding, Auto Tank Water Refilling and a self-cleaning washboard (AceClean DryBoard)6Retailer pageamazon.com/dp/B0DYSXC9X9Read 15 October 2026Bullet text: the dock rinses the mop pads with 167°F hot water, dries them and refills solution and water. The Amazon item details give model number RLL77SE, which conflicts with RLL22SE and is not stored

Hot-air drying, Robot tank refill2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 202655 C warm air drying and dirt level monitoring during mop washing. Auto tank refilling is in the AU store spec table4Maker product pageroborockstore.com.au/products/qrevo-curv-2-flowRead 14 October 2026Spec table: Auto Tank Refilling Yes, Auto Detergent Dispenser No

Base station water supplyiWater tanks means clean and dirty water tanks that the user fills and empties. Plumbed means the dock connects to a water inlet and a drain. The third option has tanks and a plumbing kit sold separately.

Water tanks, plumbing kit optional1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Clean and used water tanks. Footnote: a Water Hookup Kit is available for separate purchase and support may vary by region. The maker's review blog says the same

Water tanks8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Compare page lists Plumbing Connections: No

Base station dust containeriWhat the dock empties the robot's dust into.

Bag1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dust bag in the dock, two bags in the box

Bag1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Dock ships with a pre-installed disposable dust bag

Base station dust capacityiCapacity of the dust bag or bin in the dock.

3.2L1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20263.2L dust bag

Not available

Days between bag changes (claimed)iThe maker's estimate of how long the dock holds dust before it must be emptied. Makers assume different homes, pets and schedules.

100days1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Up to 100 days. Footnote: based on a calculation derived from environment testing in the maker's lab, conditions not stated

65days2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Up to 65 days without manual emptying. Internal testing, depends on usage habits and environment

Clean water tankiClean water tank in the base station.

4.5L1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Clean/Used Water Tank Capacity 4.5L/4.0L

4L8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Compare page lists Bin Water Tank 4 litres, which Clubic also lists as water tank capacity of 4 l. Read as the dock clean water tank13Spec databaseclubic.com/596191-roborock-qrevo-curv-2-flow.htmlRead 14 October 2026Clubic spec sheet lists water tank capacity 4 l, no dock or robot label. Its dust container 2.5 l conflicts with the 2.7 l of Vacuum Wars, so no dock bag capacity is stored

Dirty water tankiDirty water tank in the base station.

4L1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Same row as the clean tank

Not available

Mop wash water temperature (claimed)iHighest water temperature the dock uses to wash the mop. The maker's own figure. Makers measure at different points, so values are not comparable between makers. The measuring point is required in the source note. A maker can claim another figure in another market, so it is per variant.

75°C1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Auto Mop Cleaning with Hot Water 167°F, which is 75 C. Footnote: base station water outlet temperature up to 167°F after heating, at about 73.4°F room temperature

75°C2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Up to 75 C. Footnote: temperature measured at the internal heater output, internal testing. The US page gives 167 F

Mop drying air temperature (claimed)iTemperature of the warm air the dock blows over the mop. The maker's own figure. Makers measure at different points, so values are not comparable between makers. The measuring point is required in the source note.

Not available

55°C2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Air at the base outlet during drying can be heated up to 55 C at standard room temperature

Battery and charging

3 of 6 differ

Battery capacityiPublished capacity of the robot's battery pack at the nominal battery voltage. When the maker gives a typical or headline figure and a lower rated figure, the headline figure is stored and the rated one goes in the source note, as for Dreame. A rated figure alone is stored. A count times a capacity, such as 2600 mAh x 2, is not a pack capacity. The total is stored only when the maker or a review states it.

5,200mAh1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: 5,200mAh. Footnote: based on in-house lab data

5,200mAh1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026FAQ and spec box: 5,200 mAh. Charging from 15 percent to full takes about 3 hours, a partial charge that is not stored6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026Basic Parameters: 5200 mAh typical

Battery voltageiNominal pack voltage, such as 14.4 V.

14.4V5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Reseller copy of the user manual specifications: robot model RLL22SE, rated voltage 14.4 V DC. 5,200 mAh at 14.4 V is 74.9 Wh

14.4V6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026Basic Parameters: 14.4 V/5200 mAh (TYP) lithium-ion battery

Rated poweriRated electrical power of the robot from the spec sheet, label or manual. The base station's power is not included. A charger input rating from the manual, such as 20 V 2.5 A, is not this value.

75W5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Robot rated power 75 W in the same table. The base station model is RCLE0305

65W4Maker product pageroborockstore.com.au/products/qrevo-curv-2-flowRead 14 October 2026Spec table: Rated Power 65W. The AU store is the Official Roborock Online Store ANZ

Max run time (claimed)iLongest run time on one charge that the maker claims. Makers usually state it in the quietest suction mode without mopping. Claims that include charging breaks are not stored.

220min1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Up to 220 minutes. Footnote: tested in vacuuming mode under quiet suction

228min4Maker product pageroborockstore.com.au/products/qrevo-curv-2-flowRead 14 October 2026Spec table: Runtime (Quiet Mode) 228min. Vacuum Wars lists 242 min and Clubic 240 min. The maker figure with a named mode is stored

Full charge time (claimed)iThe maker's claim for charging from empty to full. A partial charge, such as 9 to 80%, is not stored.

210min5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Full charge time approximately 3.5 hours, stored as 210 minutes. SmartHomeCompared also lists 3.5 hours. Dreame's review article says roughly 4 hours

Not available

Recharge and resumeiThe robot returns to the dock to charge and then finishes the job where it stopped.

Yes1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Page text: returns to the dock for recharge and resumes cleaning from where it left off

Yes6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026If the battery runs low during a cleaning cycle, the robot returns to the dock and resumes where it left off after charging

Noise

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Noise (claimed)iOne row per noise figure the maker publishes. Suction mode is the maker's mode name, such as "Standard". When the maker gives a range, the top of the range is stored. A row leaves out the activity or the mode when the maker does not name it, such as a figure for quiet mode alone or a bare figure with neither.

ADreame L40s Ultra

Activity	Suction mode	Noise (dB(A))
Vacuuming	Quiet	55
Vacuuming	Turbo	72
Dock emptying	Not available	80

Source3Maker product pagedreametech.com/blogs/blog/dreame-l40s-ultra-reviewRead 15 October 2026Dreame's own review article dated 2025-08-10: Quiet mode roughly 55 dB, Turbo (Max) about 70-72 dB at the robot, dock emptying about 80 dB. The top of the range, 72, is stored. The standard mode is only called the low 60s and is not stored. No weighting or test method is stated

BRoborock Qrevo Curv 2 Flow

Activity	Noise (dB(A))
Vacuuming and mopping	65
Mop washing	57
Mop drying	56
Dock emptying	70

Source1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026FAQ: Vac and Mop mode 62 to 65 dB (65 stored), mop washing and drying about 56 to 57 dB (57 stored for washing), hot air drying 56 dB, dust emptying 70 dB. Weighting and suction mode not stated

Connectivity and app

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Wi-Fi standardi802.11n is Wi-Fi 4, 802.11ac is Wi-Fi 5 and 802.11ax is Wi-Fi 6. Use the highest protocol the manual lists. None only when a source says the robot has no Wi-Fi.

Not available

Wi-Fi 47Owner's manualgl-files.roborock.com/product/center/images/v69660e28ac3eb.pdfRead 14 October 2026RF Specification: WiFi 802.11b/g/n, 2400 to 2483.5 MHz. 802.11n is Wi-Fi 4

Wi-Fi bandsiBands the maker's manual or spec table states. Many robots use 2.4 GHz only. Vacuum Wars' Wi-Fi version column is not used for this field.

2.4 GHz5Retailer pageteamplush.by/en/product/dreame-l40s-ultraRead 15 October 2026Operating frequency range 2400-2483.5 MHz and only 2.4 GHz networks are supported

2.4 GHz6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026Connecting to the App: only 2.4 GHz WiFi is supported7Owner's manualgl-files.roborock.com/product/center/images/v69660e28ac3eb.pdfRead 14 October 2026RF Specification lists 2400 to 2483.5 MHz only

Bluetooth versioniAs published, such as "4.1". Robots use Bluetooth for setup.

Not available

4.17Owner's manualgl-files.roborock.com/product/center/images/v69660e28ac3eb.pdfRead 14 October 2026RF Specification: Bluetooth BLE 4.1. A third-party manual copy lists 802.11b/g/n/ax and BLE 5.2 for a Flow/FlowX combined manual, the maker CE manual is used

MatteriThe maker states Matter support. Support that is only promised for a later update is not counted.

No8Spec databasesmarthomecompared.com/robot-vacuums/dreame-l40s-ultraRead 15 October 2026The review says this model has no Matter or native Apple Home support

Not available

Voice assistantsiThird-party assistants that can control the robot, such as "Amazon Alexa".

Amazon Alexa, Google Assistant2Press releasedreametech.com/blogs/news/dreame-l40s-series-robot-vacuum-launchRead 15 October 2026Compatible with third-party voice assistants (Alexa, Google Assistant)9Reviewvacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-testedRead 15 October 2026Alexa and Google Assistant, as in the maker's launch article

Amazon Alexa, Apple Siri Shortcuts, Google Home2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Voice commands via Amazon Alexa, Apple Siri Shortcuts or Google Home. Matter is promised for an upcoming OTA and is not stored

Built-in voice controliThe robot has its own microphone and responds to spoken commands without a smart speaker.

No1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Voice Control Third-Party. Comparison table: Direct Voice Control absent9Reviewvacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-testedRead 15 October 2026Review notes there is no built-in voice assistant

Yes2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Built-in Hello Rocky voice assistant that works offline

Companion appiThe maker's phone app for the robot, by name.

Dreamehome1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Dreamehome App Control section

Roborock app6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026Connecting to the App: open the Roborock app and tap Add

Saved mapsiNumber of floor maps the robot can store, for homes with several levels.

41Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Navigate and Map section: Fast Mapping (4 Maps)3Maker product pagedreametech.com/blogs/blog/dreame-l40s-ultra-reviewRead 15 October 2026The robot can save up to 4 floor maps

41Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026Multi-Level Mapping recognizes up to 4 levels. Stored as 4 saved maps

Live videoiThe app can show the robot's camera view live.

No4Maker product pagedreametech.com/blogs/blog/robot-vacuum-comparison-l40-l40s-ultra-ae-ceRead 15 October 2026Comparison table row Remote Video Viewing: no for the L40s Ultra, which has no camera

Yes2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Real-time video calls with the built-in camera for pets8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Compare page lists Live Video Monitoring: Yes

Measured

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Suction at the brush housing (measured)iSuction pressure a reviewer measured with a manometer at the robot's brush housing on the highest power setting. It is far lower than the maker's figure and is not comparable to it.

Not available

0.47kPa8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Vacuum Wars suction bench test at the brush housing, maximum power, 0.47 kPa9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 20260.47 kPa suction bench test

Airflow (measured)iAirflow at the suction inlet on the highest power setting, measured by a reviewer with an anemometer.

Not available

16CFM8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Vacuum Wars airflow bench test, maximum power, 16 CFM9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 202616 CFM airflow test

Embedded sand pickup on carpet (measured)iShare of sand worked into medium-pile carpet that the robot removed in a timed run on the highest power setting. The reviewer weighs the robot's bin before and after.

92%7Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Vacuum Wars carpet deep clean test, sand embedded in carpet: L40s Ultra 92 percent, average 75 percent. Review last updated 2026-09-16

87%8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Vacuum Wars Carpet Deep Clean Test, sand embedded in medium-pile carpet, 87 percent9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 202687 percent embedded sand removed, average 76.7 percent

Pet hair pickup on carpet (measured)iShare of a fixed weight of flattened pet hair, about 2.5 inches long, removed from carpet in two runs. The reviewer weighs the hair left behind.

91%7Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Vacuum Wars 2.5-inch flattened pet hair on carpet test: 91 percent

77.5%8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Vacuum Wars 2.5-inch flattened pet hair test, 77.5 percent9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 202677.5 percent of 2.5-inch flattened hair removed, average 81 percent

Max threshold (measured)iHighest single threshold the robot cleared on a reviewer's test rig.

Not available

Not available

Test obstacles avoided (measured)iNumber of the 24 test objects the robot steered around in Vacuum Wars' standard and torture obstacle tests.

77Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Vacuum Wars standard and torture obstacle tests: 7 of a possible 24 objects

169Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026Standard and torture obstacle tests: 16 of 24 objects avoided, average 16.6

Area per charge (measured)iFloor area the reviewer estimates per charge from measured battery use and a fixed floor plan, on the lowest suction setting without mopping. Vacuum Wars multiplies battery efficiency by navigation efficiency. It is not a full-charge run.

179.77m²7Reviewvacuumwars.com/dreame-l40s-series-reviewRead 15 October 2026Chart: 1,935 sq ft times 0.09290304 = 179.77 m2. Battery efficiency 2.10 min per percent and navigation efficiency 0.85 m2 per min. The page does not repeat the power setting

119.57m²8Measurementvacuumwars.com/compare/robot-vacuums/roborock_qrevo_curv_2_flowRead 14 October 2026Compare page 1287 sq ft times 0.09290304 = 119.57 m2. Battery efficiency 1.44 min per percent, lowest power setting without mopping9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026Under 1,300 sq ft estimated per charge

Dimensions and weight

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Robot shapeiShape seen from above. D-shaped means a flat front and a round back.

Round1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table lists 13.78 x 13.78 in. Round body in the maker photos

Round9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 2026Top-mounted LiDAR on a round-bodied robot, per the review's photos and the 353 x 353 mm footprint

Robot widthiWidth of the robot from side to side.

350mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: 13.78 x 13.78 x 3.82 in, which is 350 x 350 x 97 mm. The page says dimensions may vary by up to 0.08 in

353mm5Maker product pageroborock.com.my/product/%E3%80%90new%E3%80%91roborock-qrevo-curv-2-flow-pre-orderRead 14 October 2026Robot 353 x 353 x 119 mm. The US page gives 13.9 x 13.9 x 4.7 in

Robot depthiLength of the robot from front to back. The Length in a maker's Length x Width x Height is the depth.

350mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026See width note

353mm5Maker product pageroborock.com.my/product/%E3%80%90new%E3%80%91roborock-qrevo-curv-2-flow-pre-orderRead 14 October 2026See width note

Robot heightiHeight at the robot's lowest operating position. A fixed lidar turret is included. A retractable turret is lowered. This decides which furniture the robot fits under.

97mm1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20263.82 in = 97 mm. The LDS turret is fixed and included

119mm5Maker product pageroborock.com.my/product/%E3%80%90new%E3%80%91roborock-qrevo-curv-2-flow-pre-orderRead 14 October 2026119 mm including the fixed LiDAR turret9Reviewvacuumwars.com/roborock-qrevo-curv-2-flow-reviewRead 14 October 20264.7 inches (119 mm), relatively tall

Height with sensor raisediHeight with a retractable lidar turret raised. Empty for a robot without a retractable sensor.

Not available

Not available

Robot weightiRobot with battery and dustbin, without the base station. Some store pages label the robot and dock together as Robot Weight. Check that the figure fits the robot alone.

4.1kg(9 lb)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Robot Vacuum Weight 9.04 lbs = 4.10 kg

4.6kg(10.1 lb)5Maker product pageroborock.com.my/product/%E3%80%90new%E3%80%91roborock-qrevo-curv-2-flow-pre-orderRead 14 October 2026Robot Weight 4.60 kg on the Roborock Malaysia store. Clubic lists 5.3 kg, the maker figure is stored

Base station dimensionsiWidth, depth and height of the dock. When the maker gives the depth with and without the ramp, the depth with the ramp is stored. Makers write the axes in different orders, so they are mapped with care. A size the maker gives for the robot and dock together counts only when the robot sits inside the dock's footprint, and the source note says so.

Width340Depth457Height590mm(13.4 × 18 × 23.2 in)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Base Station Dimensions 13.39 x 17.99 x 23.23 in, which is 340 x 457 x 590 mm in width, depth, height order. Depth follows the other Dreame docks. The ramp extension in the box is not described

Width450Depth450Height450mm(17.7 × 17.7 × 17.7 in)5Maker product pageroborock.com.my/product/%E3%80%90new%E3%80%91roborock-qrevo-curv-2-flow-pre-orderRead 14 October 2026Dock 450 x 450 x 450 mm with robot docked. The AU store lists Dock and Robot plus Dock as 450 x 450 x 450 mm. The German page labels this robot and station

Base station weightiDock without the robot and with empty tanks.

9.2kg(20.3 lb)1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026Spec table: Base Station Weight 20.28 lbs = 9.20 kg

9.6kg(21.2 lb)5Maker product pageroborock.com.my/product/%E3%80%90new%E3%80%91roborock-qrevo-curv-2-flow-pre-orderRead 14 October 2026Dock station 9.60 kg. The US page gives 14.33 kg for robot and dock together

Certifications

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FCC IDs

Not available

Not available

Other certificationsiNamed certifications, verbatim, such as a TÜV SÜD or UL Solutions cybersecurity mark.

Not available

TÜV certified to ETSI EN 303 645 cybersecurity2Maker product pageglobal.roborock.com/pages/roborock-qrevo-curv-2-flowRead 14 October 2026Page says TUV-certified to ETSI EN 303 645

In the box

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In the boxiItems supplied with this exact model, verbatim.

Robot Vacuum x1, Base Station x1, Main Brush (pre-installed) x1, Brush Guard (pre-installed) x1, Side Brush (pre-installed) x1, Scale Inhibitor (pre-installed) x1, Dust Box (pre-installed, including dust box filter) x1, Mop Pad Holders x2, Mop Pads x2, Dust Bags (pre-installed x1) x2, Cleaning Tool x1, 200ml Cleaning Solution x1, Base Station Ramp Extension x1, Quick Start Guide x1, User Manual x11Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026What's in the Box list on the US page

User Manual, Robot, Dock (with pre-installed disposable dust bag), Power Cord1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026What's in the Box list on the US page

Links

Not compared

Product page

www.dreametech.com/products/l40s-ultra-robot-vacuum1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 2026

us.roborock.com/products/roborock-qrevo-curv-2-flow1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 2026

Spec sheet

Not available

Not available

Manual

Not available

gl-files.roborock.com/product/center/images/v69660d59068cb.pdf6Owner's manualgl-files.roborock.com/product/center/images/v69660d59068cb.pdfRead 14 October 2026

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

3years1Maker product pagedreametech.com/products/l40s-ultra-robot-vacuumRead 15 October 20263-Year Warranty on the US store page

1year1Maker product pageus.roborock.com/products/roborock-qrevo-curv-2-flowRead 14 October 20261-year Warranty in the US store shipping and returns row

Both are also in the API. Back to all robot vacuums.