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 microfiber cloth, HOBOT-388 can freely move on window surfaces indoors and outdoors to polish the dust away. While the screw-in DC power jack design can avoid losing power, the embedded UPS (Uninterrupted Power System) can prevent the robot from falling off the window, even keep the device for 20-minutes if the power cord is disconnected. Furthermore, HOBOT-388 has AI Technology used for drawing human intelligence for achieving a high cleaning performance.