Usage Tips:Features:Electronic pressure switch will control pump to start and stop automatically according to the pressure and rate change in the system line.The automatic pressure controller is used to avoid the pump on/close and pressure high/low problems, which can reduce water hammer effects.Simple to maintain constant pressure during operation with push button control.It can control different types of pumps including self-priming pump, jet pump, garden pump, clarified , centrifugal pump, widely used at yard, home, garden, greenhouse.The pump controller is easy to install, insert the controller into the pump, remove the cover with a tool, and connect the cable from the pump to the controller. Specifications:Materials: PlasticStyle: pc1/pc2/pc3a/pc3b/pc5Size: as shown in the pictureStarting pressure: 1.5 or 2.2 barMaximums current: 10AmpMaximums pressure: 10 barRate voltages: 110V or 220VFrequency: 50/60hzThreaded interface: G1 Note:Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1pc Pressure Controller Switch