Safe material: BPA-free drinking water dispenser, food grade silicone hose, 304 stainless steel, high density ABS plastic, non-toxic and odorless. High compatibility: the right device for electric pumping for pure bottled drinking water, suitable for a variety of leverless gallon keg models. Compatible with bottles of different capacities: 4.5L, 5L, 7.5L, 10L, 11.3L, 15L, 18.9L. Note: This drinking water pump is suitable for gallon barrels with a 2 neck, 16 inches (5.5cm). Please confirm your gallon barrel neck size before purchasing. USB Rechargeable Battery: Built in 1200mAh rechargeable battery. It can be used for 30-40 days or about 4-6 5 gallon bottles of water when fully charged. You don't need to charge every day. Easy to use: just put the drinking water pump in the neck of the bottle. An automatic operation switch, convenient and quick, completely trouble-free even for children and the elderly. Lightweight and easy operation, the pumping device of the device is suitable for drinking water in pure bottle, suitable for a variety of Gallon barrel models without straining the lid. Best choice for home, kitchen and office for daily use.