A. This is a power fuse holder and fuse box specifically designed for car audio systems. It comes with an audio fuse tube and is also equipped with a waterproof rubber sleeve. B. In terms of design, it offers a variety of specifications, including one-to-one, one-to-two, one-to-three, and one-to-four configurations. This can meet the diverse needs of different users. Whether it's a simple circuit setup or a more complex system, users can find a suitable specification. The waterproof rubber sleeve is a notable feature as it can effectively prevent moisture from intruding and protect the fuse holder and fuse tube. This significantly improves the product's stability and durability in various environments and reduces the occurrence of malfunctions caused by moisture issues. C. In terms of usage, it is mainly applied in car audio systems to provide a stable and safe power supply for audio equipment. When an abnormal current occurs in the circuit, the fuse tube will blow in a timely manner to cut off the circuit, preventing damage to the audio equipment due to excessive current and ensuring the normal operation of the car audio. D. Due to its reliable performance and practical design, this product is popular in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East. In addition, it has an authorized own brand, and its quality is trustworthy.