This is an automatic circuit breaker for audio system modification, specifically designed for cars, RVs, yachts, etc. It serves as a reliable assistant for circuit protection. In terms of design, it is made of zinc alloy, which is sturdy and durable, effectively ensuring stable operation in various complex environments. There are multiple specifications available, including 30A, 40A, 50A, 60A, 80A, 100A, 150A, 200A, 250A, and 300A, meeting the diverse needs of different users. It has a wide range of applications and is suitable for general vehicle models. Whether it's for cars or boats, it can be easily adapted, featuring good universality and compatibility. It can automatically restore power and perform the function of circuit protection and insurance, providing reliable safety protection for your audio system and the entire circuit system. This helps prevent damage to equipment caused by circuit faults, allowing you to use it with greater peace of mind. This product is sold in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and its quality has been widely recognized. Additionally, it has an authorized self - owned brand, further highlighting its unique value.