Installation Notes: 1. First stop the car and turn off the engine. 2. Fix the start button in a suitable position. (Avoid locations that are easy to touch by mistake, and dig a round 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 suitable position. 4. The black wire of the relay box should be connected to the metal of the car body or the negative electrode of the battery. 5. The blue wire is connected to the 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 . Remarks: This product must be used with the original car key, turn the key, and the car can be used after the power is turned on! The car is not started immediately by pressing the button. Applicable instructions: 1. Start the engine: insert the key and turn to the power-on state, and then press the start button of the shift head. After the engine starts, release the button as soon as possible to avoid damage to . To 2. Turn off the engine: turn the key to OFF. Precautions: 1. Only suitable for DC12V. 2. When the engine is running, do not press the start button again to avoid starting the device. Specifications: Commodity: One-key start of car modification engine Material: PVC Color: blue light, red light Specification: 3.5cm in diameter Packing size: length 8cm*width 5cm*height 16cm Weight: 0.148g Applicable models: Specification: 12V power supply (do not press the start button again when the engine is running to avoid malfunction of the starting device) Packing list 1*One-key start button with light