The IntelliMouse Optical incorporates all the great features of the IntelliMouse Explorer mouse into its design--optical technology, cool red underglow, titanium accents and superior performance. It also answers the most common complaints about the Explorer. For example, the two troublesome side buttons that were on the Explorer have been moved--there is one on each side of the IntelliMouse Optical, so both right- or left-handers can now program and use these buttons for any number of functions. In addition, the IntelliMouse Opticals smaller body is comfortable for people who dont have large hands.
Installation is quick and easy. The IntelliMouse Optical plugs into your USB port or into a PS/2 port with the included adapter. It comes with IntelliPoint software for both PCs and Macs so you can program the two extra side buttons and the wheel button. Once you have set up the buttons, the mouse is ready to go.
Just like the Explorer, the IntelliMouse Optical works on most surfaces and doesnt require a mouse pad. It is possible to use the mouse on a wood desk, stacks of paper, a trouser leg, the carpet and other non-reflective surfaces. Dont try to use this mouse on a glass desk, though--the IntelliMouse Optical needs to be on an opaque surface. The optical technology works by taking 1,500 pictures per second of the surface beneath the mouse and instantly comparing the series of pictures to track movement across the surface.
We also enjoyed using the IntelliMouse Optical for gaming. Its super-accurate and quick to respond. And the scroll wheel is tight, making it easy to select weapons. Whatever the application, the IntelliMouse Optical is a great mouse with almost no flaws. We highly recommend it.--Ara Jane Olufson
Pleased with the results? I certainly am! The excelent transmission rates and conductivity, along with the warrantee ensures that Im gonna be getting a life time of top quality usage out of these! This has realy helped with managing all those cables. A good price to!.. 
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i have had one of these mice for ever ,i blew my last one out accidentally and went everywhere to get another. It has more options for programming than any other mouse i have seen.
Ive used MS Intellimouse Trackballs since they were first released. The main reason I chose them is because you manipulate the ball with your index finger and middle finger, which makes it that much more accurate than thumb-trackballs. The addition of a USB interface and optical technology means tha..