Our Wall Mounting 42'' LCD advertising player can be sorted into two versions according to function. One is standalone version, which uses CF card to update advertising content, this is suitable for customers who purchase only a few LCD displays, they could save the content they want to display into CF card, then insert CF card into LCD display to update content. The other is network version, update advertising content via internet which support RJ45 interface, WiFi and 3G. This is ideal for customers who purchase many LCD displays, they can set a server and update many displays content via internet, do not need to update one by one, very convenient