Water pump with USB rechargeable battery - Fits for 2, 3, 4, 5 gallon water bottles and other standard size bottle. 1. High Compatibility: Quality silicone hose, 304 stainless steel pipe, High density ABS plastic shell. 2. USB powered: A rechargeable battery can be used to pump out 4-6 water jugs if fully charged. 3. Fits All Standard Size Bottle: Standard size is 2.15 Inch (5.5cm) neck, fits for 2, 3, 5 and other standard size bottle. 4. Extensive use: Portable device for both indoor and outdoor use like office, home, Kitchen, camping, picnic, activities, etc. Specification: Material: ABS, 304 stainless steel and silicone Large lithium battery: 1200mAh Charging time: 3-4 Hours Charging: Micro USB charging cable Suitable for: 2, 3, 4, 5 Gallon Water Bottle Size: 2.9 * 5.1 Inch Hose length: 21.3 Inch Pipe length: 3.3 Inch Instructions: 1. Connect the silicone hose and then insert the silicone hose into the bottle. Then fasten the water pump. 2. Press the button to pump out the water. 3. Press the button again to stop pumping. 4. Charge with the Micro USB cable when out of battery. Note: This drinking water pump is suitable for gallon barrels with a 2.16-Inch (5.5cm) neck. Please confirm the size of your gallon barrel neck before purchasing.