Usage Tips:Features: brand and high quality The pressure switch is suitable for cold and hot water automatic self-priming pumps, jet pumps, garden pumps, clean water pumps and other water pumps. It can automatically turn on and off the water pumps according to the changes in the pressure in the pipeline to achieve unmanned control. The operating cylinder has stable performance and for protection The machine saves power consumption. Pressure range: 1.0-1.8KG (suitable for 125W), 1.5-2.2KG (suitable for 250W 300W 371W). Rated voltage: 110V/230V; rated current: 10A/5A. The use of silver material double contact clutch to ensure the applicable strength of the switch, stable and reliable quality, and long service life. Adjustment operation: The working environment of the water pump is different, some are well water, some are tap water, and the pressure in the water pipe itself is different, so you need to adjust the switch (please cut off the power when adjusting). Remove the screw on the plastic cover. Increase the pressure to the "+" indicator to fine-tune, and to lower the pressure to the "-" indicator to fine-tune. Package Includes: 1x Pressure Switch Specifications: Material: ABS+Metal Type: pressure A 1/4' outer wire / pressure A 1/4' inner wire / pressure A 3/8' inner wire / pressure B 1/4' outer wire / pressure B 1/4' inner Wire/pressure B 3/8' inner wire Rated Voltage: 110V/230V Rated Current: 10A/5A note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.