In regards to window cleaning robots, there are 2 main types: Round-shaped & Square-shaped; both attach to the surface of a window with the help of a vacuum motor. Round-shaped have 2 cleaning wheels with microfiber (double side usable). There's a vacuum motor inside to rotate the wheels while the device is moving; similar to hand movement...

HOBOT announced a new robot on CES this week. HOBOT-388 is a window cleaning robot carrying the new patented ultrasonic water spray nozzle that can nebulize water to 15μm mists then sprays it evenly on the glass like the effect of human exhales on the glass. Benefited from a vacuum motor inside, two specially-design cleaning wheels and a mi...

HOBOT-298 brings revolutionary bio-mimicry technology into play. The new invention carries a detachable water tank along with an ultrasonic water spray nozzle which nebulizes water to 15um mists then sprays it evenly on the glass like the effect of human exhales on the glass surface.