... .high resolution 32767*32767 , make sure the high touch accuracy , IR one just have 4096*4096 .2.Fast response , and support ... easy totake place when any one get problem . But for IR IWB , have lots of ic and led on the board ... the4 frames , not so easy to maintain , etc .,Specification : MultiTouch Interactive Whiteboard Touch Technology:Optical ImagingInput Method:touching&writing by finger or ...