Volt: 12VElectric current\uff1a3.5ARated 170/200 PSI- This pressure switch is designed for high-pressure on-board air systems.- Ideal for air horns that require high air pressure. Preset to turn on the compressor when tank pressure is below 170 psi， and turn off the compressor when the air tank pressure reached 200 psi，with a tolerance of\u00b110%. - Can operate reliably up to 3.5 amps.- For 12 volt power source.- With 1/8\"male pipe thread，and 1/4\"push-on electric terminals.Fits for Air Horns，Train Horns，Air Suspension Compressors，ect.Package includes: 1 x Horn Compressor Air Pressure Switch