- Function: avoid excessive current and protect the electrical appliance. 12V DC Inline Car Circuit Breaker Switch Automatic Audio Fuse 20A/30A/40A/50A... - 20A, 30A, 40A, 50A, 60A, 80A, 100A, wide ampere range of your choice. - Function: avoid excessive current and protect the electrical appliance - If you want to disconnect the circuit, press the red button and the line will be disconnected. Wide application: suitable for car audio/video system overload protection. - Red Push Button Reset, Connect Circuit - Suitable for overload protection of car audio/video system. Stable and durable: a long service life. Also suitable for boats, bicycles, buses, motorhomes and marine. Material: zinc alloy + plastic. Easy to use: the circuit breaker allows you to easily connect or disconnect the circuit if required. - Circuit breakers are a perfect replacement for high performance systems that are constantly blowing fuses or for anyone who is tired of paying spare fuses. 12V Circuit Breaker 12V-36V DC 20A-60A Car Truck Audio Amplifier Circuit Breaker Automatic Reset Fuse Holder Switch For Stereo Modification Car Circuit Breaker Voltage: Only suitable for 12V DC Package contents: 1 x circuit breaker. Dc Fuse|Enhance your vehicle's audio system with our versatile 12V-42V DC Circuit Breaker, featuring a resettable fuse design for reliable overload protection and manual reset functionality The circuit breaker can be attached to a panel or firewall. 2 Pcs 12V-24V DC Fuse Holder 20A 30A 40A 50A 60A 80A Brunei Also suitable for boats, bicycles, buses, caravans and marine.