Default On(Cut-in) pressure: 140PSI Default Off(Cut-out) pressure: 175PSI Cut-out & Cut-in pressure is adjustable DIFFERENTIAL: 30-40PSI UL and CSA Rating Approved Maximum Voltage: 240VAC MANIFOLD: 1/4" NPT, 4-Port With an Auto ON/OFF function Item Includes: 1X 140-175 PSI 4 port air compressor pressure control switch