Single-pole, triple-throw switch permits four connection modes: Battery One, Battery Two, two batteries in parallel, or both off. Rated for 300-amps continuous at 6 VDC, 150-amps continuous at 12 VDC. For 6-Volt to 32-Volt D.C. systems. Includes alternator field circuit disconnect to allows switching while the engine is running. Selector has positive click positions. Bakelite housing with brass terminals and brass nuts. Install with #10 screws. 1, 2, Both, Off.