This is an very excellent CD tuner which plays mp3 format music from CD R and RW discs and front input USB port.which is very handy. There is also an aux input for connecting mp3 music devices. The unit comes with a good manual and I needed only an auto lead to connect to a nissan micr which only cost like £7.99. The depth of the unit a bit smaller than a roadstar model and was easier to fit as nissan micra because it didn't have much space in the back. The unit does not have a DIN connector but sony provides a cable to make it DIN compatible.not a problem. Sony also provides a aeria adaptor and saves you$ another £5. It was easy to install and the music quality is very good. The whole Cd player is very good value for money for only £70 for a branded name!