... mp4, touch mp4, mp4 Features *Support extra signal, USB/SD card switch directly. *Support radio function, and has digital display. *Has MP3 ... /MP4 WMA recode chip. *Support USB, SD, MIMC card playing. *Support up, down, adjust volume, EQ, play/pause, stop ... of MP3/MP4 song. Protable digital radio with FM/SD card/MMC/USB