HP X900 USB Mouse (Black) Dependable quality shouldn't come at a cost and with the HP optical mouse you get great comfort and awesome features at an irresistible price. A contoured shape designed for all-day comfort in either hand, Powerful 1000 DPI optical sensor for precise movement on most surfaces, Strict HP standards and guidelines ensure long-lasting quality, 3 button solution and a built-in scroll wheel for optimized productivity, Supports Windows 7 and above and Mac OS X 10.x and above.