Enhance your computing experience with the Kensington Expert Wired Trackball Mouse. This gray trackball mouse boasts a maximum DPI of 1000 and an optical tracking method, making it perfect for precise movements. With four buttons and a wired connectivity, this mouse provides a seamless and efficient navigation experience. The Kensington Expert Wired Trackball Mouse is ideal for those who demand maximum productivity from their computing devices. Its spare grey trackball ensures that you have a complete set of tools to handle all your navigation needs. This mouse is compatible with a variety of devices and is perfect for use at home or in the office. Includes spare grey trackball replacement