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1)Embeded receiver design.21000/1500/2000 optical DPI, high resolution
3)Convenient scroll wheel,working freely on usual surfaces
4)Work distance:within 10.0meters 5)Many colors available,and each color have different style,can really have a large audience
6)Automtically sleeping and wake-up saving power function
7)Compatible with Windows 98/2000/XP,NT4.0, Me, Linux
