Why Choose NAMSAN Automatic Water Bowl (Blue)? * Automatic Dog Water Bowl provide fresh water for your pet all the time * Solve the worries that pet will not have water to drink if owner go out work * In the hot summer water can be supplied for pet in time you needn’t add water to pet frequently * The capacity of the water bowl is 2 L and suitable for pets of all sizes Working Principle: A float valve to control the inlet and outlet water switch to achieve a constant water level keeps a continuous supply of fresh water flowing ensure your pet has enough water to drink every time. Operation Process: Teflon tape provided. The water inlet can be connected directly to a hose/pipe with 1/2 female end. Our package comes with an upgrade 3/4 male adapter. Notice that water hose not included. Please feel free to contact with us if you have any install question.