ITEM NAME:100A Automatic Circuit Breaker Inline Replace Fuse For Car Audio Marine New Descriptio n Description: Easy to use and durable. Function: prevent excessive current, protect the electrical appliance. Apply in connecting audio power line. Use in place of an inline fuse holder. Suitable for car audio/video system overload protection. Specifications: Material: Plastic Color: Black Size: About 77x50x39mm Way of working: 1. Open circuit protection: When the current reaches the disconnection value, the long handle automatically pops open, and the power is cut off. Generally, the short circuit.(Use in place of an inline fuse holder. If you use the long handle to power off the handle, the breaker will be broken and there is no warranty). 3) After resetting the popped long handle, the circuit breaker is energized.