The Lenovo Essential USB Mouse is more than your basic mouse. It features an easy plug-and-play connection to PCs with a USB cable. The ergonomic full-size design provides comfortable grip for all day comfort. A high-resolution, 1600 DPI optical sensor ensures you’ll be smoothly gliding from window-to-window. Full-size mouse for better grip; Wired USB connection; High resolution at 1600 DPI; Ambidextrous design