Fully Automatic Single hole Water Spray Window Cleaning Robot Intelligent Household Electric Glass Cleaning Machine Remote Control Ultra-thin Window Cleaning Machine (Attention: This product offers five years of maintenance service, but the round-trip shipping payment ought to be borne by means of means of oneself. If you've any questions, you might contact customer service. Place an order to purchase, default to realizing you return across any problems, do not rush to comment. We can touch customer support to reply your questions.) The energy supply passes the CCC, CE, FCC, UL, ROHS safety testing and certification with automated spray Packing list: 1 host 1 power wire + adapter, 1 handheld remote control 1 battery pair 2 pairs of cleansing rings (4) 1 extension of four meters 1 security rope 10 cleaning cloths 1 guide (or English manual) 1 after-sales guarantee card Using way: 1. Wait 20 seconds after starting up till the blue mild give up flashing,Then delivery working. Because the robot want 20sec to stumble on the glass plane. 2. Binding the security rope when using, Prevent falling from excessive altitude. 3. Spray some water on the fringe of the Mop when working, could be greater effect. 4. When you bought the item, please touch us if you have any questions, we can solve it for you.