Function: suitable for car audio/video system overload protection,prevent excessive current, protect the electrical appliance.Apply in connecting audio power line,Use in place of an inline fuse holder.Manual open circuit push button,Self-Testing & Manual Override,No fuse change trouble.Can be mounted on panel or firewall,works with 12v-24v DC.Applications: Battery chargers, audio, auto, trucks, buses, marine, RV's, trolling motors, etc.Specification:Material: Metal+ABS PlasticVoltage: 6V-28VWorks with 12-24V DC.Size: Approx 51mmX21mmPackage Includes:1 Piece Circuit Breaker Reset FuseholderNote:Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)Please check the size measurement and the picture carefully before making payment.Dueto the difference between different monitors, the picture may notreflect the actual color of the item. Please understand,Thank you.