Narwal Flow

The dock empties the robot’s dust bin, usually after every run. You only empty the dock’s bag or bin. On this model: derived from the station type

The dock washes the mop for you, so you do not rinse it by hand. On this model: derived from the station type

The dock dries the mop afterwards, so it does not sit there wet and start to smell. On this model: derived from the station type

The highest threshold the robot takes, as the maker states it. Measure your own: the step into a bathroom or onto a balcony is often higher.

An extending leg or wheel that carries the robot over a high threshold. Without one it usually stops at about 2 cm.

How tall the robot is. It decides whether it fits under your sofa, bed or cabinet.