1. This automotive modification accessory is designed specifically for the modification of automotive wiring harness relays. It is ingeniously designed, fully considering the complex wiring environment inside the vehicle and the actual usage requirements to ensure perfect compatibility with various automotive electrical systems. 2. It comes in a variety of specifications, including 4 - pin relays, 5 - pin relays, 4 - pin socket wires, 5 - pin socket wires, 4 - pin relays with socket wires, and 5 - pin relays with socket wires, which can meet the diverse modification needs of different users. Whether it is a simple optimization of the automotive circuit or a complex upgrade of the automotive wiring harness, this product can handle it easily. 3. Due to its wide range of applications, it is a useful helper in the automotive modification process. It allows car enthusiasts to modify and upgrade the vehicle's electrical system, enhancing the vehicle's performance and user experience. The proper use of this product can make the vehicle's electrical connections more stable and efficient, providing strong support for the reliable operation of the vehicle. 4. It has an authorized proprietary brand, and its quality is reliable. This product is suitable for the North American market, providing professional and reliable solutions for automotive modification.