Features: Safe Material: BPA free drinking water dispenser, food grade silicone hose, 304 stainless steel, high density ABS plastic, and no smell. USB Rechargeable Battery: Built in rechargeable 1200mAh battery. Can used for 30 days or around 4 bottles of 5 gallon water once full charged. No need to charge every day. High Compatibility: The electric pumping device suitable for pure bottled drinking water, suitable for a variety of models gallon barrel without pry the lid. Easy to Use: Simply fasten the small pump on the bottle mouth. One switch operation, totally hassle free even for kids and elders. Great customer service, if you have any problems wiht the item, please connect us in time.