SteelSeries Kana v2 Optical Gaming Mouse, Black LIGHTING WITH PURPOSE: Scroll wheel LED intensity can be assigned to indicate which CPI profile is enabled. TOGGLE ON-THE-FLY: CPI toggle for on-the-fly high/low sensitivity adjustments. COUNTS PER INCH: Scalable pointer speed up 3200 in increments of 400, 800, 1600 and 3200 CPI. SIDE BUTTONS: Ambidextrously placed side button on each side of the mouse. DOUBLE BRAIDED CORD: Improved durability and tangle-free via its double braided nylon cord.