... high reliability.5. Safely locking system function to avoid take way flash memory card and ... and card copying files (such as CF card to SD card, or SD to CF card etc.); ... Playing advertising program automatically and circular; support media format: JPEG (JPG), MP3, AVI, MPEG1, MPEG2, MPEG4, ... folders, copy all target files to those different folders, system would default to play your target file one ...