ECU MASTER - BATTERY ISOLATOR - STANDARD BATTERY LUGBATTERY ISOLATOR Ecumaster Battery Isolator is a motorsport master relay devicedesigned for FIA compliant battery isolation and engine shutdown. The device is designed for harsh motorsport environments and weighsonly 83g. Featuring a full solid state design, an absence of mechanicalcomponents ensures long life and high reliability. The device has built in alternator load dump protection without theaddition of any external components. There is no risk