Phoenix PM1VAA 90/120 PSI 1-Port Air Compressor Switch with Unloader Valve and Auto/Off (NE-MA type) 3 Year Warranty against defects and failures 90 - 120 PSI air compressor switch 1-port, 1/4"G (BSP) pipe fittings Auto/Off lever = yes, Unloader valve = yes Maximum motor switching capacity = 20 Amps HP @ 120V / 20 Amps HP @ 240V