1Electrical Protection: Circuit breaker can protecting car audio, low voltage, and high current electrical equipment from current overload damage. 2Quick Fusing: When the circuit current exceeds the rated current, the fuse will automatically fuse and break, which can effectively protecting the electrical appliances. 3High in Safety: The amp circuit breaker comes with good plastic casing, with cold resistance, heat resistance, splashing resistance, and dust prevention. 4Manual Reset Design: The manual control reset button is easy to operate and can also be used as an on and off switch for the battery. 5Wide Application: Mainly used for overload protection of audio and video systems as well as Dc sound amplification systems on cars, ships, trucks, buses, Rv, and so on.