AMPER: 20A, 30A, 40A, 50A, 60A, 80A, 100A, 150A. Works with 12V-24V DC. You can choose from the wide range of amperages to suit your needs. SAFETY PROTECTION: Prevents excessive currents and protects electrical devices. Self-testing: the circuit breaker trips automatically when the current is overloaded. ROBUST AND DURABLE: The internal screw is made of pure copper to ensure a long service life. The circuit breaker can be mounted on the panel or firewall. EASY TO USE: The circuit breaker allows you to easily connect or disconnect the circuit as needed. Plus, you don't need to spend extra money replacing fuses. WIDE APPLICATION: Suitable for overload protection of car audio/video systems. Also suitable for boats, bicycles, buses, RVs, and marine applications. --Specifications-- Amp: 20A, 30A, 40A, 50A, 60A, 80A, 100A, 150A Voltage: 12V-24V DC Size: 10x4x4cm Material: Plastic and Metal Package Included 1 * Circuit Breaker Notes A 2-3cm difference may exist due to different measurement