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Title: I'm fully satisfied with my Kensington Expert Optical Trackball
Review: My older Expert trackball connected via PS2 port and I had trouble with my laptop recognizing it when connected through my port replicator at my desk. This USB connected device works great! This is the most comfortable and functional mouse device I've used - I love the options I have to setup the extra buttons and the scroll wheel is very easy and convenient to use. Setup was simple. I am planning to buy one for my home PC.
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