On/off Switch Boat Battery Disconnect Switch Waterproof Master Isolator for RV Battery Marine Boat Car Vehicles (red) Extra Heavy Duty - Rated: 1250 Amps Intermittent, 275 Amps continuous at 12V DC. 2-Position: ON and OFF positions Can be used with 8V up to 60V 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 The rear cover insulating the rear terminals against any short circuits to meet ABYC requirements 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