The new Hobot 298 is the perfect window cleaning robot for glass surfaces with and without frames. It is the first of its kind equipped with an ultrasonic spray system. The window robot sprays fresh water or window cleaning solution onto the glass through a side-mounted spray nozzle. Additionally, the window cleaning robot adapts perfectly to irregularities on the cleaning surface. With a large microfiber cloth, the Hobot is also particularly fast and cleans glass surfaces in no time.