This Modern Innovations Self-Window Cleaner is safe and easy. It can clean glass, marble, floor and tables. With rain and other weather conditions, the windows can get very dirty and dusty. It is very inconvenient to clean them by yourself, however, hiring a professional window cleaner can get expensive. This Self-Window Cleaning robot will cost you less. App control lets you self-control the robot it will recognize the cleaning path and avoid obstacles once it's finished cleaning it will automatically stop.