The MS-FRD1 interface allows the replacement of a factory radio in select Ford/Lincoln/Mercury vehicles. The MS-FRD1 will maintain operation of the SYNC® system in vehicles with Sony®, THX®, Audiophile® & Shaker® audio systems & also audio systems without external amplifiers . The MS-FRD1 allows audio from the SYNC® system to play through the aftermarket radios auxiliary input. This interface will also retain an external factory Sirius Satellite Radio tuner as well as Rear Seat Entertainment. SYNC® or the factory Sirius tuner can be controlled from the Steering Wheel Controls or from the seperate multi-function LCD display.