Its optical technology delivers precise cursor control with the touch of a finger while the two-button design provides an interface that’s familiar to mouse users. I once had a Kensington unit wear out on me (and only one in all these years) I phoned them to order another one and to praise how that unit had endured all. And with a terrific (5 year) warranty to back it up. Navigate with greater comfort and precision while saving valuable desktop space with the Kensington Expert Mouse Optical USB Trackball. Designed for PCs and Macs, the new Expert Mouse employs Kensingtons DiamondEye optical technology for smooth, precise cursor movement. Kensington's Expert Mouse is not only much faster in operation and more efficient than any mouse, it's also built like a Tiger tank. When paired through Bluetooth, this Kensington wireless trackball mouse saves valuable USB port space.
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Scan through documents in seconds with the unique scroll ring, and customize your trackball to suit your needs with the free TrackballWorks software. Add it all up and you get exceptional comfort and ease-of-use that has set the industry standard for more than 20 years. Navigate your desktop with precision and speed with this Kensington wireless trackball mouse. The four buttons are customizable using highly intuitive KensingtonWorks software, while the award-winning Scroll Ring lets you quickly scan up and down web pages and large documents. Featuring DiamondEye technology, the trackball uses optical tracking to precisely follow small flecks embedded in the large 55mm ball to provide smooth, accurate cursor control. The Kensington Expert Mouse Wired Trackball is the ultimate productivity enhancer that makes working at the desk quicker, more accurate and extremely comfortable for your hand and wrist. Digital Adapters & Miscellaneous Cables.