The Lenovo essential USB mouse is more than your Basic mouse. It features an easy plug-and-play connection to PCs via a USB cable. 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