Compatible with: Air spring activated switch is suitable for motorcycle suspension and pneumatic adjustable seats of cars and trucks. A relay (not included) may be needed to turn off the compressorPneumatic Control: Switch is pneumatic. Please check the plug of the original switch before purchasing to confirm whether it is pneumaticWorking Principle: Air spring activation switch is built into the manual paddle valve switch. Pushing the paddle switch up and down can control the opening and closing of the compressor relay. Controls the flow of air from the air tank or compressor to the hanging bag or Seat pneumatic device, and the average bag filling time is 8-12 secondsHigh-Quality Material: The Spring trigger switch is made of ABS material, and after fine surface treatment, it can have a longer service life and be more durable and reliable