Our product car CD changer is a new generation car mp3 player.There is essential distinction between car CD changer and car MP3. Belows is the selling point: 1. Directly control by the original headunit,and easy to install without destroy to car original equipment.It is very convenient to control when you are driving. 2. It is not FM signal, wired connection, anti-jamming. 3. To get power from the headunit, it don’t need any extra power like Cigar lighter power. 4. Allows setting folders as multi CDs. It can be created 6-16 virtual disks.To arrange the songs is very convenient.