BenQ Zowie EC2-A E-Sports Ergonomic Optical Gaming Mouse Ergonomic right-handed design Plug and play - no driver needed Perfect lift-off distance: Only 1.5 ~ 1.8 mm 16-step scroll wheel DPI ( Dots Per Inch ): 400 / 800 / 1600 / 3200 Adjustable USB report rate 125 / 500 / 1000 Hz Buttons: 5 Length of cable: 2m / 6.6 ft