12 Volt With A 1/4" NPT Male Thread. You Should Never Run An Air Compressor Directly Off The Switch. Air Tank Pressure Switch For Compressors. The Item On The Photo Is Exactly What You Will Be Getting.
Air Compressor Tank Pressure Switch 90 Psi On 120 Psi Off Air Horn Bags 1/8 NPT
Air Compressor Tank Pressure Switch 110 Psi On 145 Psi Off Air Suspension 1/8NPT
Air Compressor Tank Pressure Switch 110 Psi On 145 Psi Off Air Suspension 1/4NPT
Air Compressor Tank Pressure Switch 165 Psi On 200 Psi Off Air Suspension 1/8NPT
Air Compressor Tank Pressure Switch 165 Psi On 200 Psi Off Air Suspension 1/4NPT
Air Compressor Tank Pressure Switch 110 Psi On 145 Psi Off Air Horn Bags 1/4 NPT