1、Fully Enclosed Design: Heavy duty cutoff switch made of ABS plastic enclosure and copper plated inner studs. The fully enclosed design defends the line from dust, corrosion and rain. This is the best choice for harsh marine conditions. 2、Prevents Over Discharge: This battery cut off switch for DC 12‑48V systems is used to isolate and secure the electrical system; eliminates any power draw from the battery and safely disconnects the battery when the vehicle is not in use; provides a reliable way to shut off power during maintenance and prevents over discharge of the battery. 3、Clockwise And Counterclockwise Operation: 2 position switch for a variety of systems. Rated for 275A DC continuous (1 hour), 455A DC intermittent (5 minutes), 1250A DC start (10 seconds). Open clockwise, close counterclockwise. 4、Color Label: Battery disconnect switch with clear color label in open or closed position. Open is power, green, to closed circuit, closed is to cut off the circuit without power, for red. 5、Wide Application: The battery disconnector switch is universal for RV, Marine, Car, Boat, Campers, Travel, Truck, ATV, UTV batteries and other engine applications, making it easy to turn the battery on and off.