the portable car shower is a kind of in-car accessories.it is easy to wash your vehicle, car, dog, hiking boots etc. the car shower consists of high pressure underwater pump, water gun power supply and water tank. the water plow and spray paten can be adjusted easily by the switch on the water gun handle. the shower can be powered from your car electricity power system or 4 x d-sized batteries,it is easy to launch. pls contact us freely for more details of the portable car shower. best regards. mr. lin msn: singsinomarket at hotmail dot com