1) Wiring IN (BAT) incoming wire, OUT (AUX) outgoing wire. 2) Press the oval button, the long handle pops open, and the circuit breaker is powered off. (Be sure to press the elliptical button, if the power is cut off with the long handle, the circuit breaker will be broken, and there is no warranty). 3) After resetting the open long handle, the circuit breaker is energized.1. Open circuit protection: When the current reaches the disconnection value, the long handle will automatically pop open to cut off the power supply. Generally, it will be opened under short-circuit conditions. After the fault is eliminated, press the long handle back to the original position to form a path 2. , Manual power off: We need to disconnect the circuit when refitting, directly press the oval red button on the insurance, then the long handle will automatically pop open and cut off the power. Connect the same as above, and then press the long handle back to its original position.Auxiliary and accessory circuits commonly used in truck, bus, RV, ATV winches and marine applications. Also used for battery charging and DC PA systems. INTRODUCTIONEasy to use and durable, can be used in place of in-line fuse holders to prevent overcurrent, protect appliances - brand new, made with high quality parts, suitable for connecting audio power cables - no more money to replace fuses - unique push button reset also works as Termination Switch Specifications: Amp Range: 150A High Current Circuit Breaker Voltage: 12V-24V DC for Cars, Boats,Note, because there may be color and size difference between the light effect photo and the actual product, please allow 1-2 cm errorQuantity: (1 piece)Size: as shownColor as shown