<ul><li>Optical tracking - get precision movement with a tracking system that works through light for less moving parts and greater durability than ball-based mice</li><li>The optical sensor within the HP PS/2 2-button optical scroll mouse employs a resolution of approximately 800dpi</li><li>Left-handed or right-handed users can enjoy a contoured shape that suits either preference, with a wheel that also functions as a third button</li></ul> Glide over a variety of surfaces with speed and accuracy using the HP PS/2 mouse for the latest advancements in optical tracking technology.<br /><br /><p> </p>