This foldable electric water pumper unit is good for most types of gallon barrels and is compatible with different capacity bottles. It has newest foldable design that can avoid dirt, save space to store and easy to carry around to outdoor. Make life easier at home, ,office, picnics, beach days and barbecue scenarios. It is designed two switch button, 1.Long term switch button, click this button, the water dispenser can pump out 1.5L water, then stop automatically, 2.Timing switch button, Stop after pump out 800ML water. You can always manually stop by click the button. It come with rechargeable 1200mAh battery inside. It can be used for 30-40 days or around 6-8 bottles of 5 gallon water once full charged. It is BPA free drinking water dispenser, food grade silicone hose, no toxic, and no smell.It is specially designed for food and drinking.