2011 Lincoln Navigator Oem radio with SYNC Navigation, built in satellite radio, built in hard drive, CD, DVD, DTS, THX4, RSE. Unit is in perfect working condition and was removed to upgrade to aftermarket.  It also comes with the paired THX 4 audio amplifier. This unit fits 2009-2014 Navigator and many other makes and models.  Some of the models are listed below.  If upgrading please confirm and be sure that this unit fits you vehicle as the info provided below SHOULD be correct. 

Radio part# BL7T 18K931 BB

Amplifier part# BA5T-18B849AC

2009-2010 Ford Edge

2009-2012 Ford Escape*

2009-2014 Ford Expedition

2009-2010 Ford Explorer

2009-2010 Ford Explorer Sport Trac

2009-2012 Ford F-150

2009-2012 Ford F-250

2009-2012 Ford F-350

2009-2010 Lincoln MKX*

2009-2014 Lincoln Navigator*

2009-2011 Mercury Mariner*

2009-2010 Mercury Mountaineer

Feel free to contact with any questions.