Features Designed for Electrical Protection: The Rankomu circuit breaker can protect car audio, low-voltage, and high-current electrical equipment from current overload damage. When the circuit current exceeds the rated current, the fuse burns out and automatically disconnects, which can well protect the electrical appliances. Advanced Safety Features: Made of premium phenolic plastic housing and waterproof protective cover , the amp breaker has resistance to cold, heat, splash, Unique Manual Reset Design: the auto breaker has manual control reset button, easy to operate, can also be used as an on/off switch for the battery. Wide Application: Mainly used on car audio and video systems, boat, truck, bus, RV, ATV, marine, etc, and DC sound amplifier system overload protection. NOTE:please comnfirm the current and voltage load of your circuit before your purchase.This is a very easy switch for you Easy to Mount and install Descriptions:This Circuit Breaker offers critical protection to your system. When the system is over power or short circuit, the breaker will cut and save your equipment. No need to replace the fuses, the system can be reset by a simple switch which also offers safe and instant system shut down. Specifications:Operation mode: electronicInput voltage: 12-42V DCHigh current protection(Optional): 50A,  80A, 100A, 150A, 200A, 250A, 300ABreaking speed: normal breaking speedExtinguishing arcing capacity: mediumStructure: ACBPolar number: monopole Product size: 74 x 49 x 45mm/2.91 x 1.93 x 1.77inchStud: 1/4"-28Product color: black plasticOperating temperature: - 32 ° C ~ 82 ° CWeight: 85g Package Included:1 x Circuit Breaker Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List