The Lenovo Essential USB (Universal Serial Bus) Mouse is more than your basic mouse. It features an easy plug-&-play connection to PCs via a USB (Universal Serial Bus) cable. This ergonomic full-size design provides a comfortable grip for all day comfort. A high-resolution, 1600 DPI optical sensor ensures youll be gliding smoothly from window to window. Full-size mouse for better grip Wired USB (Universal Serial Bus) connection High resolution of 1600 DPI Ambidextrous design