Compared with the window cleaning robots on the market, this product has the advantage that it can be operated without a remote control machine. Dear buyers, Glad you like this product. Please note that this product needs to be plugged into a power source and cannot be charged. This cannot be used for charging. The battery inside the robot is used to support the safety device to prevent falling. Packing list: 1 host 1 power cord + adapter, 1 remote control 1 pair of batteries 2 pairs of cleaning rings (4) 1 extend 4 meters 1 safety rope 16 cleaning cloths 1 manual (or English manual) 1 after-sales warranty card Operation steps of window cleaning robot: 1. Wait 20 seconds after starting, until the blue light stops flashing, and then start working. Because the robot needs 20 seconds to detect the glass plane. 2. Tie a safety rope when using it to prevent it from falling from a height. 3. Spray some water on the edge of the mop when working, the effect will be better. 4. After receiving the item, if you have , please and we will solve it for you. (When you don't know how e it, I will give you the answer and send you the operation video)