Self-priming Pump: Self-priming function, which can prevent liquid from backflow in the pump, allows it to be mounted above water tank. Note: Do NOT submerge the small water pump in water Inlet & Outlet Comes with 2 tube clamps easy to connect with water hose with 8mm inner diameter firmly. Left hose to enter water and right hose to exit water Easy Wire Connection: Simply connect two wires to a 12V-power battery or any converter to 12V power regardless of positive or negative poles Operation Tips: Recommend to install it in a dry, well-ventilated location and can't work in water. And the water pump will be automatically cut off when the pressure of water outlet is over 130PSI Wide Application: Widely used in sprayers, garden sprinklers, lawn, shower, tour vehicles, special vehicle, ship, beverage, vehicle cleaning, carpet cleaning, ground cleaning, water purification and water treatment equipment, Manufacturer: ZKLGS