Click in comfort—with either hand. The optical technology developed by Microsoft has reached a new peak of performance for both right- and left-handed users. Designed by ergonomic experts, this mouse delivers top-notch performance along with outstanding flexibility and ease of use.

Get more functionality from your mouse. Two extra buttons let you go Back and Forward in your Internet browser without clicking the toolbar. Or you can reassign them to a command or keystroke that you use more often, such as copy and paste.

Work in comfort, whether you mouse with your left or right hand. Ambidextrous design makes it comfortable either way.

The rectangular Universal Serial Bus (USB) plug connects to a Windows- or Macintosh-based computer. The included IntelliType Pro keyboard software comes in a Windows or Mac OS version (Mac OS 10.1 to 10.1.3).

The fastest, most accurate mouse on the market delivering optical technology. Superior tracking speed translates into precise cursor movement and accuracy.

Take advantage of total flexibility with two connection options. You can connect to either a round PS/2 port or a rectangular Universal Serial Bus (USB) port for plug-and-play convenience.