The circuit breaker circuit is made of alloy material with good conductivity. Protect electrical devices from excessive current. Switch type, easy to use. It is very convenient to press once to disconnect. Simply push the red part back to reconnect. Dimensions: 80 x 52 x 40mm / 3.14 x 2.04 x 1.57" Product Description Size Name: As shown in the picture Description: A safe and convenient circuit breaker for car audio or major car electrical appliances.No need to remove or install fuse, one hand operation. Specification: Voltage: 12V~24V Fuse holder: 80A, 100A, 150A, 200A, 300A (optional) Dimensions: 80 x 52 x 40mm / 3.14 x 2.04 x 1.57" Quantity: 1 Weight: 88g (approx.) Package includes: 1 circuit breaker Notes: 1. Due to manual measurement, please allow 1-3mm error. Thank you for understanding. 2. The monitor is not calibrated same, and the color of the item shown in the photo may be showing slightly different from the actual product. Please refer to the actual product.