High Compatibility:The water pump fits for universal size bottle for 2-5 gallon. It compatibles with different capacity bottle: 5L, 7.5L, 11L, 18.9L.Please confirm the size and make sure to buy bottle caps (if you don't have them) when you order. USB rechargeable: This automatic water pump has a built in rechargeable 1200mAh battery, can be used for around 8 bottles of 5 gallon water bottle once fully . Moreover, it pumps fast and is quiet! Integrated & Stylish design: The water pump adopts integrated design & leak-proof design, which has great sealing performance and refuses to water leakage. No water is stored inside to prevent bacterial infection. Safety Food Grade Material: The drinking water dispenser features solid ABS body, silicon hose.The electric water pump applies a high-quality water pump that the use of more at ease. Simple Operation with one button:This portable water dispenser runs with one button pump mode. No more heavy lifting and hassle free operation even for elders and kids. Besides, it can flexible to move around, dream choice for home, office, outdoor picnics, school, factory, hospital, camping,, etc.