... designed 4.Portable, weightless DG-200 Smart portable electronic interactive white board l DG - 200 is the ... Geometry, Optical, Electromagnetism and chemical instrument, professional symbols, electronic MHD, electron orbital and isotopic etc. More than 860 ... .5-5 mProjection zone20-200 inchLocalization accuracy 0.05-0.2mmCalibrationAuto/ManualComputer interfaceUSB2.0Weight150gDimension100×50×60 mmi- ...