1Each circuit has a red LED warning prompt. If the fuse blows, the red LED next to the fuse will light up, allowing you to easily identify and replace the blown fuse. 21 power connection/10 circuit outputs, each circuit has a maximum of 30 amps, and each panel is 100 amps. 4?way blade fuse box can interchangeable or compatible with all automobiles and devices equipped with a 10?33 Volt Dc power source. 3The neat clip?on plastic cover provides extra protection for your fuse box and fuse. Simple operation, splash?proof and dust?proof design. 4Heavy?duty structure, the fuse panel has a #10?33 stud for power supply, 250?inch (about 635.0 cm) male quick disconnect terminal, and can receive 10?33 volt Dc input voltage. 5Made of environmentally friendly Pbt material, strong, insulating, heat-resistant and flame-retardant.