Wi-Fi based CDN (Contents Delivery Network) platform enables users to perform upload and download various contents, including images, videos and advertising content for displaying on digital display(digital frame/TV/DID) through Wi-Fi network using Wi-Fi supported SD card and web based contents management server(Media Studio) anytime they want. Save initial system investment Reduce the offline cost like as printing, delivery, etc. for promotional materials and operating costs Implement Green Office No need for construction of facilities thanks to the use of Wi-Fi networks Improve advertising exposure through multimedia promotional materials Implement customized advertising with place, time and target customers taken into account Increase revenue through enhanced POP (Point of Purchase) effect Implement advertising of company, brand and product & service in a more flexible manner Support regular digital display with media playing through external memory device Support image and video contents Contents management by category Deploy schedule management by date, time, etc. Device group management Provide the automatic media conversion function Synthesize information content and announcement ticker Automatic download according to the schedule set by the administrator Manage advertising content by channel and category Manage content by privilege (HQ, branch shop or office)