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- Romo S vs L40s Pro Ultra
DJI Romo S vs Dreame L40s Pro Ultra
What Romo S does better (5) and where L40s Pro Ultra wins (4) — every spec side by side.
vs
8.8Cleaning power6.7
8.2Navigation9.1
7.6Mopping7.1
6.3Base station8.2
6.5Battery7.4
Dimensions
Size comparison
Romo SL40s Pro Ultra
| Romo S | L40s Pro Ultra | Difference | |
|---|---|---|---|
| Height | 98 mm | 104 mm | −6 mm |
| Width / diameter | 351 mm | 350 mm | +1 mm |
| Length | 351 mm | 350 mm | +1 mm |
| Weight | 4.4 kg | 4.2 kg | +0.2 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is Romo S better than L40s Pro Ultra?
- Suction power25,000 Pa vs 19,000 Pa+32%
- Water tank (robot)164 ml vs 80 ml2×
- Height98 mm vs 104 mm+6%
- Charging time150 min vs 210 min+40%
- Noise level56 dB vs 74 dB+32%
Why is L40s Pro Ultra better than Romo S?
- Battery capacity5,000 mAh vs 5,200 mAh+4%
- Dust bag (dock)2.4 l vs 3.2 l+33%
- Dustbin (robot)260 ml vs 300 ml+15%
- Clean water tank (dock)4 l vs 4.5 l+12%
Specifications
Side by side
| Suction & cleaning | ||
| Suction power | 25,000 Pa | 19,000 Pa |
| Dustbin (robot) | 260 ml | 300 ml |
| Main brush | Dual main brushes | Dual main brushes |
| Anti-tangle brush | Yes | Yes |
| Side brushes | 2 | 1 |
| Extending side brush | Yes | Yes |
| Carpet detection | Yes | Yes |
| Dirt detection | — | Yes |
| Noise level | 56 dB | 74 dB |
| Navigation & obstacles | ||
| Navigation | Laser (LiDAR) | Laser (LiDAR) |
| Navigation sensors | LiDAR laser (LDS), Cliff sensors, Ultrasonic sensor | LiDAR laser (LDS), Cliff sensors, Ultrasonic sensor |
| Obstacle avoidance | AI camera | AI camera |
| Threshold climbing | — | 40 mm |
| No-go zones / virtual walls | Yes | Yes |
| Room mapping & room selection | Yes | Yes |
| Mopping | ||
| Mop type | Rotating mop pads | Rotating mop pads |
| Mop lifting on carpets | Yes | Yes |
| Mop lift height | — | 10.5 mm |
| Extending mop (edges) | Yes | Yes |
| Water tank (robot) | 164 ml | 80 ml |
| Base station | ||
| Base station | All-in-one dock (empty + wash) | All-in-one dock (empty + wash) |
| Auto-empty dust station | Yes | Yes |
| Dust bag (dock) | 2.4 l | 3.2 l |
| Mop washing in the dock | Yes | Yes |
| Hot-water mop washing | Yes | Yes |
| Hot-air mop drying | — | Yes |
| Automatic water refill | Yes | Yes |
| Plumbed water connection | — | Yes |
| Clean water tank (dock) | 4 l | 4.5 l |
| Dirty water tank (dock) | 3.2 l | 4 l |
| Battery & runtime | ||
| Battery capacity | 5,000 mAh | 5,200 mAh |
| Runtime | 180 min | 180 min |
| Charging time | 150 min | 210 min |
| Cleaning area per charge | 178 m² | — |
| Recharge & resume | — | Yes |
| Size & weight | ||
| Width / diameter | 351 mm | 350 mm |
| Length | 351 mm | 350 mm |
| Height | 98 mm | 104 mm |
| Weight | 4.4 kg | 4.2 kg |
| Shape | Round | Round |
| Colours | White | White, Gold |
| App & smart home | ||
| App control | Yes | Yes |
| Voice assistants | — | Amazon Alexa, Google Assistant, Apple Siri |
| Live camera view / video call | Yes | Yes |
