Pneumatic/Electric Relay:Set Point 10 PSI,25 Amp 480 Max,1 HP-125 Volt,2 HP 250 or 277 Volt Pilot Duty:750VA,277 Volt,P 2 PSI 30PSI Max,Switching:SPDT,No Enclosure.Panel-Mounted In an Approved Electrical Enclosure or Panel,Weight:1/2 Lbs ,Dims:3-1/2"H X 3-1/4"H X 1-7/8"D. Mfg/Box, Origin; USA