# Dreame L40s Ultra — specifications

Source: RankedRobot (https://rankedrobot.com/robots/dreame-l40s-ultra/) · Category: Robot vacuums & mops · Maker: Dreame
Licence: CC BY 4.0 — cite as "RankedRobot, https://rankedrobot.com/robots/dreame-l40s-ultra/ (checked 2026-10-06)".

## Summary

Dreame L40s Ultra is a robot vacuum made by Dreame. Status: Shipping. Key published specifications: suction 19,000 Pa; height 97 mm (3.8 in); runtime 220 min. Price: US$1,399.99, US (official price); US$569.99, US (official store sale price). Last checked by RankedRobot on 2026-10-06.

Disclosure: 28 sourced values, 7 not disclosed by the maker (80% disclosed). "Not disclosed" means the maker has not published it; RankedRobot never guesses missing figures (an "Estimate" is only our calculation from official figures, with the method shown).

## Prices

- US$1,399.99, US — official price — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- US$569.99, US — official store sale price — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Launch

- Announced: Not disclosed by the maker — checked: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Status: Shipping — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Body

- Dimensions: Height 97 mm × Width 350 mm × Depth 350 mm — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Weight: 4.1 kg (9 lb) — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Cleaning

- Suction (as stated) (L40s Ultra): 19,000 Pa — Manufacturer; conditions: maker in-house lab data; mode not stated — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Suction (as stated) (L40s Ultra AE): 19,000 Pa — Manufacturer; conditions: maker in-house lab data; mode not stated — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Suction (as stated) (L40s Ultra CE): 13,000 Pa — Manufacturer; conditions: not stated — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Navigation: Pathfinder™ Smart Navigation (LDS) — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Obstacle avoidance (L40s Ultra): Single-Laser 3D Structured Light — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Obstacle avoidance (L40s Ultra AE): RGB AI + 3D Structured Light — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Obstacle avoidance (L40s Ultra CE): Single-Laser — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Mopping system: rotating_pads: dual spinning mops — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Mop lift height: 10.5 mm (0.4 in) — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Robot height: 97 mm (3.8 in) — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Threshold climb: 22 mm (0.9 in) — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Dock

- Dock features: Auto-empty · Mop washing · Hot-water mop wash · Hot-air drying · Auto refill · Detergent dispensing · Self clean — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Mop-wash temperature: 75 °C (167 °F) — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Dock bag: 3.2 L — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Clean-water tank: 4.5 L — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Dirty-water tank: 4 L — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Robot dustbin: 300 mL — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Everyday use

- Runtime: 220 min — Manufacturer; conditions: vacuuming mode under quiet suction (maker in-house lab test) — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Noise: Not disclosed by the maker; conditions: not stated by manufacturer — checked: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Smart home: Not disclosed by the maker — checked: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Warranty: 36 months — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Power

- Battery: Not disclosed by the maker — checked: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Charge time: Not disclosed by the maker — checked: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)
- Hot-swappable battery: Not disclosed by the maker — checked: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Commercial

- Regions sold: US — Manufacturer — source: https://www.dreametech.com/products/l40s-ultra-robot-vacuum (checked 2026-10-06)

## Confidence labels

Manufacturer = stated by the maker · Verified = independently confirmed · Estimate = our calculation from official figures · Reported = credible media/retailer, not confirmed by the maker · Unconfirmed = leak, rumour or single source · Not disclosed = not published.