ECOVACS WINBOT W830, Automatic Window Cleaning Robot Award-winning robotics with a smart suction fan to clean even horizontal surfaces Cleans framed and unframed glass of any thickness - including Thermopane AND frosted or textured glass Pathfinder navigation calculates a custom cleaning path for speed and efficiency, while intelligently avoiding edges and obstacles Simple 3-step operation - Spray, Power On, Start Serious about safety, with powerful dual suction rings, battery backup and a safety pod/tether