Clean glass, mirrors and other smooth surfaces without ladders or streaks. The WD8 Robot Window Vacuum Cleaner uses dual ultrasonic spray to loosen dirt, smart navigation and edge detection to plan efficient routes, and a strong 3000PA suction to stay attached while it wipes surfaces clean. Control the unit from a smartphone app or the included remote and choose from multiple cleaning modes (N / Z / N+Z / spot cleaning). Its square design reaches corners more effectively than round cleaners, and a built-in safety backup power system helps keep the robot attached briefly during a power interruption for safe…