300A In-Line CIRCUIT BREAKER FOR 12-48V DC CAR A/V SYSTEM ·For car audio/video system overlord protection ·No fuse change trouble& headache ·Easy to operate with manual reset arm ·Self-Testing & Manual Override ·Can be mounted on panel or firewall ·Water Protection design ·12 Volt - 300 Amp ·Size: L 4 1/4" X W 1 5/8" X H 1 1/2 " Accept 0GA/2ga/4ga/8ga wires Other amps available: 80A,100A,150A,200A,250A