Primus IQ. A totally proportional electric trailer brake control, the new Primus IQ is self-leveling so no level adjustment is necessary. Utilizing the primary sensor technology from Prodigy, the Primus IQ now includes the "Boost" feature that gives users the ability to apply more initial trailer braking when towing heavier trailers. It works proportionally in reverse for backing into tough spots and includes a snap-in dash mounting clip and removable electrical connector that allows the unit to