Right and left-handed Lenovo 300 Wires Mouse with USB up to 20 million clicks, black: The Lenovo 300 Wired Mouse, model number GX30M39704 There is more to the Lenovo 300 USB Mouse than meets the eye. Its USB cord allows for a simple plug-and-play connection to PCs. For all-day comfort, the ergonomic full-size design offers a cozy grip. An optical sensor with a high resolution of 1600 dpi