1. This is a waterproof fuse holder for power cords, specifically designed for car audio system modification and suitable for car amplifiers and subwoofers. It is made of brass and is sturdy and durable. 2. Its design is compatible with all car models, offering high versatility. No matter what kind of car you drive, you can easily install and use it. During the car audio system modification process, this fuse holder can provide a stable power supply for your audio system, ensuring the safe and stable operation of the audio equipment. The fuse holder is equipped with a copper fuse tube, further enhancing its safety and reliability. 3. Whether you are a car audio enthusiast seeking a great music experience or a car owner in need of upgrading your car audio system, this waterproof fuse holder for power cords is a good choice. It can help you build a better car audio system. 4. Its excellent design and practical functions will add wonderful music enjoyment to your driving time.