This circuit breaker is specifically designed for audio system modifications 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 carefully considers the requirements 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 devices and flexibly address diverse circuit protection needs. This product is not only suitable for audio system modifications but also plays an important role in other electrical systems, ensuring 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 private brand, guaranteeing high - quality performance. It is an ideal choice for protecting electrical equipment.