Safe Material: free drinking water dispenser, 304 stainless steel, high density ABS plastic, no toxic, and no smell. High Compatibility: The electric pumping device suitable for pure bottled drinking water, suitable for a of models gallon barrel without pry the lid. USB Rechargeable Battery: Built in rechargeable 1200mAh battery. Can used for 30-40 or around 4-6 bottles of 5 gallon water once full . No need to charge every day. Easy to Use: Simply fasten the small pump on the bottle mouth. One switch operation, totally hassle free even for kids and elders. Note: This drinking water pump is suitable for gallon barrels with a 2.16-inch (5.5cm) neck. Operating Voltage: DC 3.7V Power Rating: 3.8W Charging Time: 3-4 Hours Charging: -USB Charging Cable Suitable for: 2,3,4,5 Gallon Water Bottles Size: 2.9*5.1 inch/7.5*13cm Hose Length: 21.7inch Pipe Length: 4.7inch Instructions: Connect the silicone hose and insert the silicone hose to 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 -USB cable when out of battery colour: Black + white Material: ABS+stainless steel Package Contents: 1 * Water Pump 1 * Inlet pipe 1 * Outlet pipe 1 * -USB Charging Cable Only the above package content, other products are not included. Note: Light 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.