From the ManufacturerMicrosoft Basic Optical Mouse for Business - BlackOptical technologyValue in an Optical MouseMicrosoft Optical Technology replaces the traditional mechanical mouse ball for greater accuracy and control. Easy and comfortable to use, Basic Optical Mouse is a good choice for value.Key FeaturesOptical Technology - Navigate with better speed, accuracy, and reliability. The optical sensor tracks movement on nearly any surface.Scroll Even Faster - Move through your documents quickly without having to use the on-screen scroll bar.Comfortable in Either Hand - Use your mouse with your left or right hand. Ambidextrous design makes it comfortable either way.Customizable Buttons - Get quick access to the media, programs, and files you use most often.Product DetailsDevice Stage - Quickly and easily access common tasks, including product information, registration, settings, and more for popular devices such as cell phones, cameras, printers, and mouse, keyboard, and webcam products. Ergonomic Design - Point and click in comfort. Ergonomic design helps you work longer without discomfort. System RequirementsComputer/Operating System Windows 8, Windows 7, Windows Vista, Windows 98/2000/XP/Pro/Home/Media Center Edition/Tablet PC EditionOther USB port