Motorola T505 ROKR Bluetooth In Car Speaker Phone with Digital FM Transmitter Motorola ROKR T505 Bluetooth In Car Plug-N-Play Speakerphone with Digital FM Transmitter is quite possibly the most advanced unit on the market today. Optimized for use in the vehicle, the T505 lets you manage your calls handsfree and listen to your favorite tunes. Portable and powerful, the T505 is a cutting edge innovation for the in-car experience.Built-In Digital FM Transmitter (No RDS) Lets you Make or Take Calls and Listen to Your Music Loud and Clear Over Your Car Stereo Speaker System. Audio CallerID Hear the Number of the Person Calling You (This Feature Maybe Dependant on Network or Sim Card). StationFinder Latest Breakthrough Technology Finds and Announces the Best FM Station for a Clear FM Connection and Minimal Static.