6610--high precision optical mouse 1).STREAMLINE CONTOUR,HIGH RESOLUTION:1000DPI 2).USB / PS2 3).CABLE1.5M 4).BLISTER 6610--high precision optical mouse1).STREAMLINE CONTOUR, HIGH RESOLUTION:1000DPI 2).USB / PS2 CABLE1.5M 3).EXCELLENT HAND FEELS4).FULLY FUNCTIONAL SCROLL BUTTON5).MOTION SENSOR FOR MOST SURFACE6).PLUG AND PLAY7).BLISTER PACKED, CE FCC CETIFICATED