... inch digital signage 2.support CF/SD/USB 3.with costomers log 4.network,wifi,3G.touch screen optional 42 inch digital ... screen.3. Build-in CF and SD card reader, support CF/SD/MS/MMS/XD card/USB drive, using CF and SD card as the source of ... USB update feature; support functions between the card and card copying files (such as CF card to SD card,or SD to CF card etc.); support U-copy, conveniently and ...