... 1PCS/wall-hung accessory 1set/Disk 1pcs Specifications1.Interactive dual-writing Whiteboard. 2. Infrared technology, Green Material. 3. 29 Languages ... different users in different areas.Support multi whiteboards connect, support writing, drawing, operation, video play, audio ,etc resource sharing, improve ... glass, mask, record, save, playback, print, email, etc. 2012 Teaching white board 80"4:3