Description: Fine Material: The pressure controller is of fine metal made, which features great durability and is not easy to break. Digital: The pressure controller is designed to be digital, which is easy for us to see the data. Button Control: The pressure controller is designed to be button controlled, which is convenient for us to operate. Waterproof: The pressure controller is designed to be waterproof, so we can worry less about splashing water. Wide Use: The pressure controller is suitable for many pumps like water pump, air pump, oil pump and etc. Specification: Material: Metal. Color: Shown as Picture. Size: Approx. 85x52x112mm/3.35x2.05x4.41inch. Working Pressure: 0-10 Bar. Relay Volume: 220V AC 10A. Working Temperature: 80℃. Waterproof: IP466. Pin: 3. Wiring: 3. White: Positive. Black: Negative. Green and Yellow: Ground. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. 1. If the pump doesn't have a check valve, then a check valve must be installed in front of the pressure and in this case the pump may be turned on or off frequently. 2. When you turn on the tap water, if the pump is on/off from time to time, please adjust the H valve to a larger valve. 3. If the pump keep runs with stopping, please lower the H valve, on the other hand, if the pump doesn't work, please set the L valve higher. Package Includes: 1 Piece Pressure Controller(with 1 Piece English Manual).