Specification: Waterproof breaker switch compatible with all 12V/48V DC Systems Function: Always protect the safety of automotive electronics, Prevent car currents from being too high and damage automotive electronic equipment. Wide Application: Typically used in solar system, battery charges, inverter, Car audio video system, boat, RV and DC sound amplifier system. save money:Two modes, Current overload disconnection and manual disconnection.After the circuit is repaired, the switch turns ON and the fuse block can be used again.No need to replace the fuse. Easy to use and :Good Conductivity, Temperature And Pressure Resistance,Splash and dust proof Water proof.can be mount on panel or firewall. Current: 100A colour: Black Material: Plastic + Metal Package Contents: 20 x circuit breaker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.