Five Oceans Dual Battery Isolator Kill Switch for Boat, Rv 6v/32v - 300/175 Amp by Seaflo Positions: Battery 1 - Battery 2 - Both - All OFF Disconnects the battery safely, to eliminate any power draw from the battery when vehicle or boat ar Isolates 1 battery or 2 batteries, or links up both batteries in parallel UV stabilized bakelite vapor-proof housing - Built to last in marine conditions Rated at 300 Amps Intermittent, 175 Amps continuous at 12V