BGW battery voltage protector is an intelligent, user programmable, fully waterproof low voltage disconnect. Prevents excessive discharge of the battery (which would damage the battery) and protects electronic appliances against overvoltage. Automatically detects the battery voltage (12 or 24V) Can be set to connect / disconnect at several different voltagesExtends battery life - Prevents damage to connected componentsRubberized polyurethane construction and low profile design, can be easily mounted in any location