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