Color: Black Connection mode: 2.4G wireless Working distance: About 10m(barrier-free) Key number: 4 DPI: 800-1200-1600DPI Supported system: Windows 2000/Win XP/Win7/Win8/Win10 Item size: 9.9 * 6.02 * 3.23cm /3.9 * 2.37 * 1.27in Item weight: Approx. 52g /1.83oz