... UL CCC 55 inch HD advertising panel lcd digital signage Digital signage features:1 Apply the newest 4Gth digital ... put the upgrade file in the storage cardsApplicable field:1.Business Organizations: supermarket, large-scale shopping malls, exclusive ... several series:LCD video wall, CCTV LCD monitor,LCD advertising player,digital signage ,electronic whiteboard,Multimedia kiosk,Industrial LCDmonitor, ...