The interface is pretty simple. All the factory buttons still exist and have been relocated so all the factory functions still work. The factory radio is relocated and the video signal is outputted from the factory unit into the aftermarket radio's A/V Input. Simply switch to the A/V input and the factory screen is now being outputted onto the aftermarket screen. The factory unit was only controlled by the central knob and buttons along the side. All those buttons continue to operate just as the factory did with the added benefit of 2014/15 technology.like to see a video of it (maybe a walk through of the basic interface) in better quality.