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、With simple design, easy to turn off in an emergencyany angle, even with glove, will not turn off vibration. 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. With simple design, easy to turn off in an emergencyany angle, even with glove, will not turn off vibration. Comes with red illuminated engine start button, and the pre-drilled mounting holes design is convenient for installation. Specification: Material: Aluminium Alloy + Plastic Color: Carbon Fiber Working Voltage: 12V Working Current: 400A Electrical Life: 50000 times Size: Shown as Picture Package Weight: approx. 424g/15oz Fitment: for 12V racing cars & RV Package list: 1 * Ignition Switch Panel 2 * Wire 4 * 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.