3D optical mouse Botton: three Interface: USB ,PS/2, 800 DPI Factory 3D optical mouseMILIEU:Windows95/98/SE/NT/XP/2000/VISAResolution:800DPI Interface:USB,PS/21) Precision optical sensor 2) Especially appearance mouse .3) Botton life: over 1,000,000 times4) OEM is welcome5) Color : blue , red