4 Relays Pre-Wired/Ganged Together. Powers A Variety Of Vehicle Systems. One Separate Relay w/Inputs And Outputs Completely Isolated. Allows Wiring In Any Configuration. Relay Inputs/Outputs Can Be Negative Or Positive. Built In Indicator LEDs Allow For Easy Troubleshooting. Easily Replaceable Fuses And Relays. Equipped w/20 Amp Fuses.