Features: Cast from alloy at scientific ratio, provides longer lifetime and more functionality than the ordinary alloy products. Excellent plasticity and good electrical conductivity, which can reduce voltage distortion and current transmission loss. Strong corrosion resistance, easy wiring. Convenient to install on negative battery head. Screwing the nut down is able to prevent theft. Suitable for most batteries at 12V, continuous current 125A, instantaneous current 500A. Specification: Material: Metal Optional Color: Black, red Voltage: 12V Continuous Current: 125A Instantaneous Current: 500A Size: Approx.6*3.2*5cm/2.4*1.3*2.0in Package Weight: Approx.118g/4.2oz Package List: 1 * Cut-off Switch Note: 1. Loosing the switch means power off, and tightening the switch allows to conduct electricity. 2. Being equipped with a 15 amp bypass fuse can ensure the power supply of car computer system, alarm, car lock and other components when the car switch is powered off. 1Cast from alloy at scientific ratio, provides longer lifetime and more functionality than the ordinary alloy products. 2Excellent plasticity and good electrical conductivity, which can reduce voltage distortion and current transmission loss. 3Strong corrosion resistance, easy wiring. 4Convenient to install on negative battery head. 5Screwing the nut down is able to prevent theft.