To play audio from your Droid on your Sync system you need to have them paired. Once they are you can go into the menu system on Sync to select the source "bluetooth audio". An easier way is to push the "media" button on your steering wheel. When Sync says "say a command", you say "bluetooth audio". You can now play mp3's from your droid on your car stereo. I have been listening to Pandora internet radio in my car and it sounds pretty darn good. Another reason to love my Droid!