Feature: 1. MANUAL RESET SWITCH: The circuit breaker has a manual reset switch, which can conveniently control the circuit breakage, equivalent to the effectiveness of the fuse, effectively protect the electrical appliances in the car, with over current prevention, over voltage prevention, current surplus prevention, and over charging prevention. 2. 12V TO 48V DC: It can significantly improve the safety level of the power supply system. 48V DC power supply is a specific voltage level, which is mainly used for appliances with higher safety requirements and lower power, and has a high level of safety under normal use conditions. But it also needs to be based on the specific use of the environment and the characteristics of the equipment for a reasonable configuration and take protective measures. 3. MATERIAL: The black shell is made of ABS anti drop material. The terminal block is made of pure copper with Ni plating, stronger anti erosion and better line bonding. The surface is silver white, more beautiful. Comes with 3 stainless steel screws and 2 pure copper terminals. 4. EASY INSTALLATION: The circuit breaker is easy to install. You can install the circuit breaker on the panel or firewall without taking a long time and a lot of effort. 5. WIDELY USED: The circuit breaker can be used to protect electrical equipment and wires. It can be used in car stereos, RVs, trucks, boats, trolling motors, stereos, battery chargers, solar energy systems, DC sound systems and more. Specification: Item Type: Automatic Circuit Breaker Material: ABS, Ni Plated Copper Weight: Approx. 230g / 8.1oz Maximum Voltage: 48V Product Size: Approx. 6x9x4.2cm / 2.4x3.5x1.7in. Package List: 1 x Automatic Circuit Breaker2 x Terminal Connector3 x Screw4 x Washer