Microsoft Optical Technology replaces the old-fashioned mechanical mouse ball and works on virtually any surface. With a convenient scroll wheel and comfortable design, Wheel Mouse Optical is a great value. Wheel Mouse Optical brings the precision and accuracy of Microsoft optical technology to an affordable mouse.??Move through documents quickly without clicking on the scroll bar. Accelerated scrolling reacts to how quickly you roll the wheel, saving you time and effort. Whether you control it with your right hand or your left, you'll appreciate the way Wheel Mouse Optical is shaped and styled for your comfort. Minimize