Introducing Primus, a totally proportional electric trailer brake control. Primus utilizes the primary sensor technology from Prodigy and features the Tekonsha one-step "Point and Go" SM set-up system. Easy-to-set system allows the driver maximum flexibility when determining how the trailer should respond to a braking even. Snap-in dash mounting clip and removable electrical connector allow unit to be quickly stored when not in use. You will appreciate the digital readout depicting a secure electrical connection and the amount of voltage delivery to the trailer brakes. For 2, 4, or 6 brake trailers. Color is Graphite