1、Used in protecting of car audio and video system, prevent power surges from damaging your equipment. 2、Simple and convenient to be installed on the panel or firewall. 3、Manual reset arm is easy to operate, automatic testing and manual coverage. 4、Unique button reset can also be used as a close switch. 5、High-technology waterproof case, practical and durable in use. Features: Used in protecting of car audio and video system, prevent power surges from damaging your equipment. Simple and convenient to be installed on the panel or firewall. Manual reset arm is easy to operate, automatic testing and manual coverage. Unique button reset can also be used as a close switch. High-technology waterproof case, practical and durable in use. Specification: Condition: Brand New Material: Metal Color: Shown as picture Voltage: 12V Optional Current: 30A, 40A, 60A Package List: 1 * Circuit Breaker