Safe Materials: BPA-free drinking water dispenser, 304 stainless steel, high-density ABS plastic, non-toxic and odorless. High Compatibility: The electric pumping device is suitable for pure bottled drinking water, suitable for a variety of models of gallon barrels without prying the lid. USB Rechargeable Battery: Built-in rechargeable 1200mAh battery. Can be used for 30-40 days or about 4-6 bottles of 5-gallon water when fully charged. No need to charge every day. Easy to Use: Simply fasten the small pump on the bottle mouth. One-touch operation, totally hassle-free even for children and the elderly. Note: This drinking water pump is suitable for gallon barrels with a 2.16-inch (5.5cm) neck. Operating Voltage: DC 3.7V Power: 3.8W Charging Time: 3-4 Hours Charging: Micro-USB Charging Cable Suitable for: 2,3,4,5 Gallon Water Bottles Size: 2.9*5.1 inch/7.5*13cm Hose Length: 21.7 inch Pipe Length: 4.7 inch Instructions: Connect the silicone hose and insert the silicone hose into the bottle. Then fasten the water pump. Press the button to pump out the water. Press the button again to stop pumping. Charge with the Micro-USB cable when the battery is dead. Color: Black + White Material: ABS + Stainless Steel Package Contents: 1 * Water Pump 1 * Inlet Pipe 1 * Outlet Pipe 1 * Micro-USB Charging Cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.