タイトルまたは説明

It can display the words , pictures and the experiments flexibly on TY and projector by the video, which is the emergent teaching tool of educantion system. It adopt the imported high quality CCD ***** has advantages , such as easy-operation(installation and downloading in 1 minute), portable and good supplement of dark light. It is cheap and used ***** effect can be equal to the expensive same type in the ***** connected with the huge screen TV, it can replace the expensive projector.