The Elkhart Supply Automatic Power Transfer Switch is intended for use as an electrical transfer switch to automatically switch multiple sources from one to another. Specifications•Type: Automatic•Function: Transfer Power Between Shore And RV Generator•Voltag: e120 Volt AC•Ampere Rating: 50 Amp•Length (IN):8-1/2 Inch•Width (IN):4-1/2 Inch•Height (IN):8-1/2 Inch•Color: Black Heavy Duty Relay Assembly Will Handle 50 Ampere Power Cord & Up To 12 Kilo Watts Generator Transfers Two Hot Poles & Neutral Simultaneously Designed With Dc Coiled Relays To Reduce Hum, & Terminal Blocks To Simplify Wire Connections | Elkhart Supply Automatic Power Transfer Switch, 50 Amp