Dreame X40 Ultra

The dock holds a 3.2 L dust bag and empties the robot's 300 mL onboard bin automatically after each clean. For most homes that means only emptying the bag every couple of months.

Yes. It clears obstacles up to 22 mm, so it handles most door sills and transitions between rooms without getting stuck.

The robot stands 3.8 inches tall, letting it slide under many couches and cabinets. Keep in mind the dock is larger, at 23.2 inches tall and 18 inches wide, so plan space near an outlet.

It lifts the mop up to 10.5 mm off the floor when it detects carpet, and it can also detach the mop pads entirely. Smart carpet cleaning also boosts attention on rugs.

Both the side brush and the mop extend outward to reach along baseboards and into corners. That helps it clean areas a fixed-arm robot would miss.