The unit is attractive, easier to install, and makes better use of space. Recessed controls protect gain and level settings from accidental readjustment. Ergonomically designed control lever for easy, accurate gain and level settings. Traditional 4-wire hookup and under-dash U-bracket assure secure and permanent installation. System is compatible with virtually any 12-volt, negative ground tow vehicle, foreign or domestic. Broad control range makes setting quick and easy. The green LED display tells you that the unit is on and there is a complete circuit with the trailer brakes. As braking power is applied, the LED changes color gradually from green to red, to indicate relative braking power. The advanced electronics in the Voyager minimizes false braking, to give you a smoother ride, even on the roughest roads. Voyager has a five-year limited warranty.