Bluetooth Usb Car Stereo With A Bluetooth Able CD Car Stereo Deck Can You?

With a Bluetooth able CD car stereo deck can you? - bluetooth usb car stereo

I watch a few decks to Circuit City and I wonder if the Bluetooth feature that you want (with a Bluetooth USB drive) is able to transfer MP3 songs from your deck or a CD without the cover or something inserted in the CD case?
Is it so simple that you can simply press a button on a USB drive and then transmits Wham (more than the frequency of 2.4) on the car CD player? There must be a catch.