Maximum voltage: 240 V. Maximum current: 15 amps. Maximum pressure: 175 psi, 12 bar. Material: plastic and zinc alloy and copper. Female thread diameter: 1/4 PT.The main role of this valve is to regulate the stop and start pressure of the air compressor. With the knob on the valve, you can adjust the air pressure as needed. Easy to install and disassemble. With the barometer, can be set and read the data. The air compressor pressure switch is an extremely imperative part, it can install or plug the air compressor or trachea, adjust the air pressure, to put in power and stop the compressor motor.Note: The data are all manual measurement, please allow 1-3cm error, due to the difference of light and display, there will be some color difference, depending on the physical item received.