Features: Easy to use and extremely durable. No fuse changing trouble. Suitable for car audio, video system overload for protection. Working methods: 1. Open circuit protection: when the current reaches the open circuit value, the long cable will be automatically opened and the power will be cut off. General short-circuit condition jumps. After removing the blemishes, press the long handle back to its original position. Bits can form paths. 2. Manual shutdown: When modifying, it is necessary to disconnect the circuit, and directly press the red oval button on the fuse. At this for time, the long handle is automatically turned on to cut off the power. Connected as above, press the long handle back into place. Specifications: Material:ABS Rated Current:30A 40A 50A 60A 80A 100A 150A 200A 250A 300A Voltage:12-48V Size:Approx.84x56x43mm/3.31x2.2x1.69in Net Weight:120g Package Includes: 1x AMP Circuit Breaker note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.