Picture frame advertising machine is a new type of advertising equipment in recent years. Its main function is to play multimedia content such as video, picture, and audio.

The samrt conference whiteboard is a very common electronic device nowadays, and it is commonly used in enterprises and commercial fields. It has smooth writing, gesture erasing, arbitrary channel annotation without changing the original file, scanning code sharing at the end of the meeting or email sending to take away meeting records, unlimited screen projection, remote conference, real-time document sharing, etc.