Stops power surges from damaging your amps, protects your trolling motor from electrical damage. Compatible with all 12V and 24V systems. Mount on panel or firewall; unique push button reset can also be used as a kill switch. No more spending money on replacing fuses. High conductivity and quality craftsmanship; withstands high temperature and pressure. Type: Car Circuit Breaker Operating Type: Electronic Input Voltage: 12-42 VDC Current Rating: 300A Open Circuit Speed: Normal open circuit speed Installation: Easy to install on any flat panel or wall Function: Over current protection, over voltage protection, current residual protection, overcharge protection Additional Feature: Includes waterproof protective plastic cover Car audio/video overload protector Automatic detection with manual recovery Operating Temperature: -32C to 82C Dimensions: 74 x 48 x 45 mm Material: Plastic + Metal Color: Black Package Contents: 1 x Circuit Breaker Note: Light shooting and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowance is +/- 1-3 cm.