The RR allows for smart car integration, such as Ford Sync. It automatically talks to your car's infotainment computer and integrates your stock bluetooth mic, stock Sirius/XM antenna, stock USB and AUX, stock computerized climate control, voice commands specific to your car, etc into your AVIC NEX. For some reason, Pioneer decided not to allow the gauges display to function. This would have showed engine status, mileage, voltages, etc.