Question about Hobot HB 298

Roof windows can also be cleaned with it. It has fall sensors. However, this product is far too expensive. There are comparable window cleaning robots at a-zone for only 160, including shipping, for example the Mamibot W120-T. Sometimes you can get it for even less. The cleaning principle is always the same, there are cleaning pads at the bottom, the robot then has a caterpillar drive with which it moves over the glass and a fan provides negative pressure so that the robot does not fall off the glass.