PAC AAI-FD4 Auxiliary Input Adapter for Select Ford/Lincoln/Mercury CAN-BUS Factory Radios Auxiliary Input Adapter for Select Ford, Lincoln, and Mercury Factory Radios Convert 12-pin satellite/CD changer port of OEM radio to RCA level audio input.Not compatible with:Navigation radios,Rear Seat Entertainment,Satellite Radio Plug and play installation maintains factory wiring integrity Provides auxiliary audio input to factory radio Direct audio inputs for excellent sound quality