MB QUART 4-Circuit Relay Bank GMR-RB4

4-Circuit Relay Bank
Four 20 A circuits that are Plug-and-Play and controlled by the GMR7V1 Source Unit part # 4405-0978 (sold separately), Allows users to easily add, wire, and control any switchable 12 V accessory in their vehicle, Quickly and easily know which fuse is blown via the glowing LED indicator that will light as long as a load is still connected to the circuit