1) pressure switch type When the water outlet is blocked and the pressure reaches the maximum, the pump will automatically stop working. 2) return valve type When the water outlet is blocked, when the pressure reaches the maximum, the water will circulate in the water pump. The motor has a long working temperature. The product is equipped with a cooling fan, and the pump can work continuously for a long time. The handle can move the pump better. Name: Miniature diaphragm pump Voltage: 12V Maximum power: 80W Open flow: 5.5L / Min Elevator: 55M Current maximum: 6.6A Pressure setting: 0.9MPA Maximum pressure work: 0.55MPA Can be used for homes, gardens, caravans, campers, oceans. Low power consumption, ultra-hydrostatic water for excellent atomization enjoyment. Excellent quality, strong stability and low noise. The structure is sturdy, the pressure limiting ability is strong, and it is durable. High stability and high pressure pumps protect the pump from service life. note: Do not spray flammable liquids Do not use in an explosive environment! Please allow minor errors due to manual measurements. Due to the differences between the different displays, the image may not reflect the actual color of the project. Sometimes the label color will be different.