HIGH COMPATIBILITY: The electric pumping device is suitable for pure bottled drinking water, suitable for a variety of models gallon barrel without pry the lid. USB RECHARGEABLE BATTERY: Easy to recharge it with the included USB cable, extremely practical, it can be used for 30-40 days or around 4-5 bottles of 5-gallon water once fully charged. 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. Good Partner for Camping, Kitchen, Workshop, Garage, etc..