Marine Boat Battery Power Disconnect Switch, Heavy Duty Battery Isolator Switch Extra Heavy Duty - Rated at 1250 Amps momentary, 275 Amps continuous @ 12V DC 2-Position: ON and OFF positions Can be used with 8V up to 50V DC systems to isolate and secure the electrical system Disconnects the battery safely, to eliminate any power draw from the battery when vehicle or boat is not in use Compact size, sleek modern appearance, sturdy and durable Patented contour link system, allowing it to be a standalone unit, or linked together with other similar switches Rotary dial has a spring-loaded keeper to lock the selected position