Specifications: -PRESET 140-175 PSI -MINIMUM ON: 50 PSI -MAXIMUM OFF PRESSURE: 175 PSI -PRESSURE DIFFERENTIAL: 35-55 PSI -¼" COMPRESSION UNLOADER VALVE CONNECTION -¼" FEMALE NPT TANK CONNECTION WITH 3 EXTRA 1/4" FEMALE NTP PORTS. -MAX AMPS, 26 AMPS AT 120VOLT / 26 AMP AT 240 VOLT No Power Switch Dimensions: 4-3/4" Long (Farthest Point) 2-5/8" Wide (Farthest Point) 3-3/4" (Bottom of Manifold to Top of Lid)