Features： 1、[Product Function] When the circuit is short circuited, the power supply can be automatically cut off to protect the equipment. 2、[Circuit Break Protection] When the current reaches the cut off value, the long car will automatically bounce off and cut off the power supply. 3、[Manual Power Off] We need to disconnect the circuit when refitting, and directly press the red button on the fuse. At this time, the long handle automatically springs to cut off the power. 4、[Usage] Stops Power Surges From Damaging Your Amps ,Protects Your Trolling Motor From Electrical Damage, Mount on Panel or Firewall. Unique Push Button Reset and Save Your Money to Replacing Fuses. 5、[Application Scope] Suitable for overload protection of car audio/video systems, boats, trucks, buses, ships and DC sound amplifier systems. Specification： Item Type: Circuit Breaker Material: ABS, Metal Product Size: Approx. 83 x 67mm / 3.3 x 2.6in Product Function: when the Circuit is Short Circuited, the Power Supply Can Be Automatically Cut off to Protect the Equipment Scope of Application: Suitable for Overload Protection of Car Audio/video Systems, Boats, Trucks, Buses, RVs, ATV Winches, Ships and Dc Sound Amplifier Systems Maximum Carrying Current: 250A Applicable Wire Gauge: 0GA/4GA Way of Working: (1) Circuit Break Protection: when the Current Reaches the Cut Off Value, the Long Car Will Automatically Bounce off and Cut off the Power Supply. Generally, It Will Trip in a Short-circuit Condition. After the Fault is Eliminated, Press the Long Handle Back to Its Original Position. (2) Manual Power Off: We Need to Disconnect the Circuit when Refitting, and Directly Press the Red Button on the Fuse. at This Time, the Long Handle Automatically Springs to Cut off the Power. Connect As Above, and then Press the Long Handle Back to Its Original Position. Package List： 1 x Circuit Breaker  2 x Screws 2 x Compressed Towel 1 x M10 Hex Wrench