Reese Primus IQ Brake Controller is a totally proportional electric trailer brake control! The new Primus™ IQ is self-leveling so no level adjustment is necessary. Utilizing the proven sensor technology from Prodigy®, the Reese Primus IQ brake control now includes an original "Boost" feature that gives users the ability to apply more initial trailer braking when towing heavier trailers. Has a onestep "Point and Go" set-up system. The easy-to-set system allows the driver maximum flexibility in determining how the trialer should respond to a braking event. Primus IQ brake box works proportionally in reverse for backing into tough spots, includes a snap-in dash mounting clip and removable electrical connector. Features a digital LED display depicting a secure electrical connection, amount of voltage delivery to the trailer brakes and diagnostics. For 2, 4 or 6 brake trailers. 15 year warranty.