A. This grounding wire hub for negative grounding of power amplifiers in car audio modification is a four-way junction box specifically designed for cars and has a wide range of uses. It is suitable for general vehicle models and can meet the needs of many car owners. B. In terms of design, its dimensions are 79*79*2.7mm. It is small and delicate, does not take up much space, and is convenient 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. C. In terms of performance, it can withstand a voltage of 12 - 48V, has 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. D. 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 private brand, and its quality is trustworthy. Whether you are driving daily or on a long trip, with it, you can enjoy a good music experience in the car.