This circuit breaker is specifically designed for audio system upgrades in cars, RVs, and yachts, offering excellent performance and wide applicability. As an automatic circuit breaker switch and a resettable fuse holder, it can effectively handle overload and short - circuit issues, providing reliable protection for electrical equipment. In terms of design, it takes into account the needs of various usage scenarios to ensure precise compatibility with general vehicle models. Whether it's a car, an RV, or a yacht, it can be easily installed and used. There are multiple specifications available, including 30A, 40A, 50A, 60A, 70A, 80A, 100A, 120A, 150A, 200A, 250A, 300A, etc., which can meet the requirements of different power equipment and flexibly handle diverse circuit protection needs. The product is not only suitable for audio system upgrades but also plays an important role in other electrical systems, safeguarding the stable operation of the entire system. It is sold in many regions around the world, such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and its quality has been widely recognized. Moreover, it has an authorized proprietary brand, ensuring high - quality performance. It is an ideal choice for protecting electrical equipment.