1. This grounding wire hub for grounding the negative pole of the power amplifier in car audio modification is a four - way junction box specially designed for cars, which has a wide range of applications. It is suitable for general car models and can meet the needs of many car owners. 2. In terms of design, its size is 79*79*2.7mm. It is small and delicate, does not take up much space, and is easy to place reasonably in the car. It is made of zinc alloy material and only weighs 0.204kg. It is sturdy and durable with good stability, which can ensure long - term use. 3. In terms of performance, it can withstand a voltage of 12 - 48V, with a power of 10W and a signal - to - noise ratio of 10dB. It can provide a stable grounding connection for the car audio system, effectively improve the sound quality and reduce noise interference, creating a pure in - car music environment for you. 4. It is sold in many regions around the world, including Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, the Middle East, etc., and its quality is widely recognized. It also has an authorized own brand, and its quality is trustworthy. Whether you are driving daily or on a long - distance trip, with it, you can enjoy a good music experience in the car.