... use 2.Easy installation 3.Structurally designed 4.Portable, weightless DG-200 Smart portable electronic interactive white board l DG - 200 ... Geometry, Optical, Electromagnetism and chemical instrument, professional symbols, electronic MHD, electron orbital and isotopic etc. More than 860 professional ... XP/VISTA/2007CPUIntel P4-1.0GRAM128MHard Disk50M Smart portable electronic interactive white board