Features: 100% brand new and superfine quality battery cut-off switch. Premium material, stable performance and high reliability. Especially used to solve the problem of leakage and loss of electricity in cars, motorcycles and automobiles whose batteries are not used frequently. Easy installation, simple operation. Suitable for various types of batteries with 15-17mm pile head diameter. Instructions: Power off: Loosen the switch for 2-3 loops and the whole vehicle is powered off. Power on: Properly tighten the switch and the vehicle can be started. Installation Method: 1. Before installation, check whether the negative battery rod and the battery clamp (original battery connector) are corroded (white powder) and clean dirty things to avoid poor contact between the battery and the battery switch. 2. Before installation, first tighten the knob and then install it on the car. After installation, check for loose connection and make sure it is perfectly installed. Specification: Condition: 100% Brand New Material: Zinc Alloy Copper Plating Optional Color: Black, green Maximum Voltage: 24V Size: Approx.9.8*4.4*4cm/3.9*1.7*1.6in Package Weight: Approx.122g/4.3oz Package List: 1 * Cut-off Switch . Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.