The Microsoft Wireless Notebook Optical Mouse 4000 is a new old stock unopened product featuring a sleek gray color and high definition optical technology. With a maximum DPI of 1000 and wireless connectivity, this ergonomic mouse offers advanced features such as a tilt wheel, magnifier, side to side scrolling, and 4-way scrolling. The optical tracking method ensures precise navigation, while the 2 buttons provide easy control for your computing needs. Ideal for users looking for a reliable and versatile mouse for their computing experience.