Connect car mp3 player with car radio,such asToyota/Honda/Mazda ect, CD sound quality , no FM noise., support USB/SD/AUX Car mp3 player USB ... . SD card or USB flash,3.5AUX are available(up to 8GB)4. Dual AUX port design make Auxiliary input and Micphone ... ,like PC,MD,PSP,GPS Navigation and Moblie Phone5. Easy to install and use.