1Function: Battery disconnect switch provides power cut off to electrical system, to help prevent battery drain, safety and efficient. When car or boat is not in use, disconnects the battery safely. 2Wide Application: Battery power cut isolator is widely used for Atv, trailers, Off Road, RVs, trucks, heavy vehicles, marine boat. 3Product Introduction: Battery disconnect switch rated current is 300A, instantaneous current is 1000A, safe and long lasting to use. 4Performance: Heavy duty aluminum alloy case has strong weather resistance, protects internal components of the switch for use in the harshest conditions. 5Unique Design: This battery isolator switch with plate is easy to install, has on and off indicator, and has a definitive sound when turning on and off.