1. Material: BPA drinking water dispenser, silicone hose, 304 stainless steel, high density ABS plastic, no toxic, and no smell. USB charging, one button to fill water immediately, which is convenient and quick. 2. Great Compatibility: Our water bottle pump is suitable for 2.16-inch (5.5cm) neck's gallon barrel without pry the lid. Compatible with different capacity bottle: 4.5L, 5L, 7.5L, 10L, 11.3L, 15L, 18.9L. Not for threaded/screw tops. Please confirm the size of your neck before purchasing. 3. USB Rechargeable: Electric water dispenser is built in rechargeable 1200mAh battery. Can be used for 30-40 days or around 4-6 bottles of 5 gallon water once full charged. Great for daily use or outdoor activities. No lifting or flipping anymore when you want to replace a water bottle. 4. : Simply fasten the drinking water pump on the bottle mouth. One automatic switch operation, convenient and fast, totally hassle even for and elders. 5. , convenient, portable and easy operation, ideal for pinic, choice for home, kitchen and office daily using, even outdoor use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.