purchase now $N.ninety nine Resolution adjustable DPI: 500/one thousand/1750 Size: 111 x sixty two x 23mm Weight: about 60g Button Life: A million occasions. wi-fi efficient Distance: S-15m Frequency: P.4GHz Compatible with Windows XP, Vista, Windows S, ME,2000 Battery:P AAA batteries(included)P.4GHz wi-fi know-how
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