Safe Material: 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-button 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 (5.5 cm) neck.Operating Voltage: DC 3.7V Power: 3.8WCharging Time: 3-4 hoursCharging: -USB charging cableSuitable for: 2, 3, 4, 5 Gallon Water BottlesSize: 2.9*5.1 inches/7.5*13cmHose Length: 21.7 inchesPipe Length: 4.7 inchesInstructions: Connect the silicone hose and insert the silicone hose into the bottle. Then fasten the water pumpPress the button to pump out the waterPress the button again to stop pumpingCharge with the -USB cable when the battery is lowColor: Black + whiteMaterial: ABS+stainless steelPackage Contents: 1 * Water pump1 * Inlet pipe1 * Outlet pipe1 * -USB charging cableOnly 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.