1.New Wireless speaker Whiteboard 2.Own R&D software ... ,etc3 Built-in Stereo SpeakerIt built in stereo speaker, effectively save limited interior space, as well ... resource, increasing interesting of the class or meeting;6) Remote & Interactive Communicate : Network sketchpad, network link , online ... 10) Free User Customize: Support add users, free switch user, edit user function menu, delete if no ...