1.Save electricity usage 2.Small in size and easy to operate 3.The battery can be recharged by USB cable 4.Just one tap to pump water 5.Can be used for gallons measuring 1.5L, 5.7L, 10L, 11.3L, 15L, 18.9L Specification Power : 4 Watt Voltage : DC-5Vpe Battery Capacity: 800mAh FAQ 1.Are there any conditions for initial use? For initial use, charge the battery for 3-5 hours with the charger with the supplied USB cable. The indicator light will stay on while it is being and will turn off automatically when it is fully . 2.How to properly install the pump on the gallon? Once the battery is fully , attach the silicone hose. But before installing please clean the top of the pump first. Then make a hole in the gallon cap so that the pump is installed properly. Then insert the gallon water pump that has been attached to the hose into the gallon of drinking water. Check and press the on/off button whether it is working properly. size: 11x5.6cm Material:plastic colour:White + Black Package Contents: 1 x Water pump 1 x USB cable 1 x Water pipe Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.