Phoenix 69HAU1 Heavy Duty 115/150 PSI 1-Port Air Compressor Switch with Unloader Valve (Furnas type) 3 Year Warranty against defects and failures 115 - 150 PSI air compressor switch 1-port, 3/8" NPT pipe fittings Auto/Off lever = no, Unloader valve = yes Maximum motor switching capacity = 2HP (24 full load amps) @ 120V / 3HP (17 full load amps) @ 240V