AMP: 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 lifespan. 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. Additionally, you don't need to spend extra money on replacing fuses. WIDE APPLICATION: Suitable for overload protection of car audio/video systems. Also suitable for boats, bicycles, buses, RVs, and marine applications. Specifications: Amperage: 20A, 30A, 40A, 50A, 60A, 80A, 100A, 150A; Voltage: 12V-24V DC; Size: 10x4x4cm; Material: Plastic and metal. Package includes: 1 * Circuit Breaker. Notes: A difference of 2-3 cm may occur due to different measurement methods. Please confirm the detailed size before ordering. Thank you for your understanding and cooperation. Due to differences in monitors and lighting, please allow slight color variations.