The Microsoft Trackball Optical 1.0 Wired USB Red Trackball Mouse DND-00001 is a reliable and ergonomic trackball mouse designed by Microsoft. With a maximum DPI of 1500 and optical tracking method, this mouse offers precise and smooth cursor movement. The red color adds a unique touch to the unit, which is easy to use and intuitive with its 5 buttons and wired USB connectivity. Ideal for those who prefer the trackball pointing method, this mouse is a practical choice for everyday computing needs.