Features: 1.Automatic circuit breaker, with push button disconnect and unique push button reset, can also be used as a kill switch. 2.The automatic circuit breaker comes with built?in high current terminal and the high temperature enclosure including cover. 3.Prevents excessive current and overload protection for amps, audio electronics, audio/video systems, and accessories from damage. 4.Suitable for car audio/video system, boat, trucks, buses, RV's, ATV winches and marine and DC sound amplifier system. 5.The installation is extremely convenient, simply mount on panel or firewall, easy to operate with manual reset arm, greatly save your time. 6.When the current reaches the disconnect value, the circuit breaker will automatically cut off the power supply, more intelligent to use. Specification: Item Type: Automatic Circuit Breaker Material: ABS + Metal Size: Approx. 102x40x64mm/4.0x1.6x2.5in (L x H x W) Application: For RV, yacht, boat, car and so on. Electric Current: 150A Accept 1/0GA or 4GA Terminal-Free How to Use: 1. Circuit break protection: When the current reaches the cut-off value, the long handle rebounds and automatically cuts off the power supply. Generally, it travels in short circuit conditions. After removing the fault, press the long handle back to the original position to form a path. 2. Manual shutdown: we need to disconnect the circuit when climbing and directly press the red oval lock button. At this time, the long handle appears automatically to cut off the power. Connect it as above, then press the long handle back to its original position.