Car MP3 Player FM Transmitter Card Slot Car MP3 Player FM Transmitter Card Slot1,Play MP3 and WMA songs 2,Read MP3 and WMA files from the USB ... PREV/V-, 5,FM transmitter Transmit music from external audio player (CD, Apple iPod,MD player etc. ) to the FM radio. 6,LCD Display ... appear working frequency(FM) and song name or appear FM,no appear song name7,Support SD card slot.128MB/256MB/512MB/1GB/2GB ...