The Microsoft Mobile 4000 Wireless BlueTrack Mouse is a high-quality touchpad mouse with a maximum DPI of 4000, offering precise and smooth tracking. It features BlueTrack technology for reliable wireless connectivity and a scroll wheel for easy navigation. This mouse comes in a sleek blue and black color scheme, making it a stylish and functional choice for users. With its wireless connectivity and USB compatibility, the Microsoft Mobile 4000 mouse provides a convenient and efficient way to interact with your computer.