... assembly -DC 5.0V,IN -power on/off Pcb with LED display(Mini audio board) Function and features:MP3/SD/USB Card ... reader, fm radio and digital screen display, with power on/off bu remote control, and so on.More information:-Supporting SD ... and so on.-Key function: last songs, next songs, volume control, Play/pause, repeatProduct No.: SW-921Technical parameters:FeaturesControl ProvidedLED, digital ...