Yeah, the cd player doesn't have the aux input. I have the stock tape/radio in mine with the aux connection. Funny thing is the radio doesn't work, the tape doesn't work, but the aux does. So i just have my mp3 player running through it. Maybe i should do something about that?
as the dood above me said
get a tape if you plan to use it in your car
the quality of the transmitters isnt very good
and u have to ususally sit it next to the areial
id also like to point out that if your in a capital city " eg sydney " you cant use the fm transmitter because they broadcast on almost every damm channel!!! the tapes are like $10 at the markets