Functions:      V5 can automatically cleans over 50*50cm framed or frameless window glass, as well as mirrors and shower doors, also can clean double windows, shower, tiles, and etc.     V5 has a 3-stage cleaning system for maximum efficiency. First the front cleaning pad with cleaning solution moistens, loosens and absorbs dirt. Second, the squeegee draws the remaining waterborne dirt off the window. Third, the rear cleaning pad wipes the window to dry and spotless shine.      2 kinds of cleaning modes: “Z” mode and “N” mode.     Seriously about safety, V5 with on-board battery backup, and safety pod and tether.        Have powerful suction: V5 remains hung safely to glass.      By adding with extension cable, the cable will reach 5.2 meters long.      V5 can be driven by remote control.      V5 has foldable handle.