Feature: 1. Function: Power On Off switch prevents any current from being drawn from the battery when your RV, van, boat, or car is not in use, to extend battery life. 2. Power Saving: The battery circuit shut off switch help eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. 3. Safe Operation: The power switch has a crank rating that withstands 675A for 30 seconds, 450A intermittent for 5 minutes, and 300A continuously, protecting against fluctuations in current during ignition. 4. Easy to Operate: The switch design is easy to read and operate, simply turn the knob to either the On or Off position, and a satisfying click will let you know it's changed. 5. Simple to Install: The casing design allows for front or rear panel mounting, with 32V working voltage, M10x4 stud, allows the switch more widely applicable. Specification: Item Type: Marine Battery Selector SwitchMaterial: ABS+brass+iron .Color: Red Screw Specification: M10x4 Working Voltage: 32V Current: 675A Cranking (30 seconds) 450A Intermittent (5 minutes) 300A Continuous Switch Gears: 2 gears, off on Application: Applicable for RV Marine and Automotive Battery Package List: 1 x Marine Battery Selector Switch1 x Cover