CHUYI Office Wired Vertical Optical Ergonomic Gaming Mouse for Computer Laptop Notebook(Blue) Superior Ergonomic Design:All buttons are easily operable without contorting your fingers. The button force is light for easy clicking, but still firm enough to avoid accidental actuation. 800 / 1200 / 1600DPI resolution optical tracking technology provides more sensitivity than standard optical mice for smooth and precise tracking on a wide range of surfaces. Long mouse line,line length 66.1 inches,no matter how the computer desk design, can be easily used Side of the custom button can be set up and down the page, improve operating speed, increase efficiency COMPATIBILITY  This comfortable ergonomic mouse is compatible with Mac OS X, Linux and all versions of Windows.