The general design of the Mi Robot Vacuum isn’t too far off from many existing offerings. At the bottom you’ll find two circular side brushes that help sweep dirt into the main cylindrical brush. To boost suction, the machine automatically adjusts its height for a tighter seal with the floor. It walks around using its two main rubber wheels plus an assistive wheel, and is aided by ultrasonic radar sensors, wall sensors, collision sensors, cliff sensors and drop sensors. As you’d expect from any high-end robot vacuum, Xiaomi’s machine is able to map your rooms using its laser distance sensor that’s poking out of the top.