Receive a 20% Cash Back coupon and Free Shipping on all ECOVACS purchases!The ECOVACS® Window Cleaning Smart Robot uses its 4-stage cleaning system to keep your windows sparkling and spotless! Simply attach the included cleaning pad on the bottom of the unit, spray cleaning solution on the pad then connect safety tether, safety pod and plug in power cord. Next, place the unit on the window. Its advanced built-in suction fan will adhere and keep the robot sealed to the window for safe cleaning. With the touch of a button the cleaning process will begin!