Product description The one-key ignition switch for car modification is a profeional product for racing drivers. There is no need to turn the car key. When the key is turned to the ON gear, you can directly pre the ignition switch to ignite. 0.5 seconds instant ignition is easy to install. Generally, the car is started by turning the key. After this product is installed, you no longer need to turn the key to ignite. You only need the original car key to be in the ON position and pre the ENGINE START button to start the car. For smart keys such as the flagship coupe, it is more convenient to directly pre ENGINE START to start the car! Specification: 12V power supply (do not pre the start button again when the engine is running to avoid malfunction of the starting device) Installation instructions: 1. First stop and turn off the car 2. Fix the start button in a suitable position. (Avoid locations that are easy to touch by mistake, and dig a hole with a diameter of 30mm) 3. Connect the connector of the start button to the relay box, and fix the relay box in a proper position. 4. The black wire of the relay box needs to be connected to the metal of the car body or the negative electrode of the battery. 5. One of the blue wires is connected to the wire loop ACC line behind the original car's start switch, and the other is connected to the start wire behind the original car's start switch. 6. The red wire is connected to the power supply, and the black is grounded. Remarks: This product must use the original car key, turn the key, and the car can be used after the power is turned on! Instead of preing the button directly, the car started immediately Applicable instructions: 1. Start the engine: insert the key and turn to the energized state, and then pre the start button of the shift head. After the engine starts, release the button as soon as poible to avoid damage to the starting device. 2. Turn off the engine: turn the key to OFF. Note: 1. Only suitable for DC12V 2. When the engine is running, do not pre the start button again to avoid starting the device