The safe way to add electrical accessories is with Painless Performance Cirkit Boss kits, the first circuit isolators that provide both constant and ignition hot circuits. Instead of tapping into an existing wire or spare circuit at the fuse block, Cirkit Boss kits are add-on, relay-activated fuse blocks, activated by a small wire from any ignition source. Cirkit Boss kits protect bulbs, accessories, and computers from the harmful spikes that may occur in a poorly connected power supply. All Cirkit Boss units are made using TXL cross link polyurethane wire rated to 275 degrees F at 600V, and they include a 30 amp inline circuit breaker, a relay, mounting hardware, and an assortment of terminals. Circuits are individually fused for up to 20 amp applications and use a heavy duty 30 amp relay. All wires are machine-terminated for reliability.