Pressure transimitter inside, stable and accuracy. Switch of the pump during water shortage and on with water. Micro-computer process chip, safe and intelligent control. One-click set up on/off limit. Waterproof: IP65 Relay Capacity: 220V AC 10A Working Pressure Range: 0-10 Bar, matching with all pumps Output signal: active output, to provide pump 220V, start the pump below 1.5KW directly Type:Digital Pump Switch Condition: Installation Remarks: If the pump doesn't have a check valve, then a check valve must be installed in front of the pressure, in this case the pump may on/off ,ore frequently. When you turn on the tap water, if the pump is on/off time to time, please adjust the H valve to a larger valve. If the pump keep runs with stopping, please lower the H valve, on the other hand, if th epump doesn't work, please set the L valve higher. Voltage: AC220V Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Colour:As Shown Material:Metal + Plastic Package Contents: 1 x Digital Pump Switch