Safe and Healthy Materials: The gallon pump is product of plastic material and comes with food-grade silicone hose. BPA free, non-toxic and odorless. Just join the small pump to the mouth of the bottle. One-button operation makes it mushy for kids and the elderly HIGH COMPATIBILITY: The gallon water dispenser is well matched with 2, 3, 4, 5 GAL ordinary water bottles with 2 inch (55mm) neck. If the bottle comes loose, put the lid on so it doesn't come loose. USB rechargeable battery: Built-in 1200mAh rechargeable battery. A total charge lasts 30-40 days or roughly 4-6 5-gallon bottles of water. No need to price each day. Easy-to-use water dispenser three-button operation: First button: Press to start pumping, press back to forestall pumping. Second button: Press to begin pumping, and it will robotically give up after forty seconds. Third button: Press to begin pumping, and it will routinely give up after eighty seconds. Improved foldable design: The water dispenser adopts a foldable design, which may keep the water outlet clear and produce you extra hygienic and more secure ingesting water. It also is extra convenient to shop and carry. Various Scenarios: The portable water dispenser is appropriate for home, kitchen, residing room, office, camping, travel, etc. Material: plastic colour: black Package Contents: 1 x water pump 1 x USB cable 1 x hose Only the above equipment content, other merchandise are usually not included. Note: Light reflection and assorted exhibits can cause the colour of the article in the picture a little bit assorted from the genuine thing. The size allowed error is +/- 1-3cm.