Window cleaning robot is able to imitate the human behavior to clean the window, especially let end-users make good use of removing stubborn stains on top or outside of the window. 
Power cleaning: brush away any particles
Two cleaning wheels covered with a microfiber cloth move and rotate on the window surface, at the same time, a powerful vacuum sucks out the dust and removes the impurities, have an outstanding cleaning performance. Most of the dust is sucked throghout the cleaning cloth by the vacuum. Even if micro-fiber cleaning cloth contains partial dust and it will not scratch the glass surface, due to its long fiber and softness.