Dreame X40 Master

It empties into a large 4.2 L bag and refills the robot's water, and the dock cleans its own base, so upkeep is rare.

The robot is 4.1 inches tall, so it fits under taller furniture but may not clear very low sofas or cabinets.

It clears obstacles up to 22 mm, so it handles standard door sills but may stop at taller thresholds.

Yes. The dock automatically dispenses detergent when washing the mop and refills the robot's water on its own.