YiaMia&reg; Handsfree Car kit MP3 WMA Play music Car Music Player Adapter Car Charger With Remote Control LCD Display FM Transmitter For Car SD/MMC SD Card USB Port (Green) Turn your car stereo on and tune the frequency the same as your car MP3 player Press the play button of the Car Mp3 player to enjoy your music Plug car MP3 player into cigarette lighter of your car directly. Plug USB Drive into car MP3 player Plug in SD Card, and even an MP3 player. Enjoy your favourite music Save Mp3 file to U Port. Plug in U Port