1、This item can control the car's ignition, reduce the impedance of the power supply, improve ignition efficiency, start faster, more agile and increase the sensitivity of the car 2、Installation of power off switch, it can instantly cut off the power of the whole car, bring unlimited driving pleasure for you 3、It applies to professional racing cars, now in some countries has been applied for common RV 4、Could be as the on/off key for all kinds of electrical devices added to the cars, such as flash lights, chassis lights, fog lights, dome lights, instant power outages and so on on 5、Pre-drilled mounting holes design is convenient for installation Features: This item can control the car's ignition, reduce the impedance of the power supply, improve ignition efficiency, start faster, more agile and increase the sensitivity of the car. Installation of power off switch, it can instantly cut off the power of the whole car, bring unlimited driving pleasure for you. It applies to professional racing cars, now in some countries has been applied for common RV. Could be as the on/off key for all kinds of electrical devices added to the cars, such as flash lights, chassis lights, fog lights, dome lights, instant power outages and so on on. Pre-drilled mounting holes design is convenient for installation. Specifications: Material: Aluminium Alloy + Plastic Color: 7 Color Working Voltage: 12V Working Current: 20A Size: 15 * 6.5 * 9.5cm/5.9 * 2.6 * 3.7in Package Weight: approx.346g Fitment: for 12V racing cars & RV Package Included: 1 x Ignition Switch Panel 2 x Wire 4 x Screws Notes: 1. No installation instructions included, professional installation is highly recommended. 2. Please allow 1-3cm error due to manual measurement. Thanks for your understanding.