An automatic window cleaning robot that can automatically clean indoor and outdoor windows. This is a robot vacuum cleaner that cleans large windows and places that are out of reach outdoors. It can clean every corner with three automatic modes that can be selected according to the situation, and it supports a manual mode using a remote control. This window cleaner is equipped with a fall prevention function for peace of mind. I bought it and used it once for a big cleaning. It was easy and didn't fall, and I enjoyed watching it. However, since I don't have many windows, I don't think I'll use it that much in the future, so I'd like to pass it on to someone who will use it. It's clean because it's only been used once, but it's still a used item, so please refrain from purchasing if you are sensitive to such things. Thank you.