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Title: LOGITECH CORDLESS OPTICAL TRACKMAN
Review: I prefer this to standard-type mouse, but no comparison to its predecessor, Logitech Track bALL Marble-FX, which is now obsolete, and incompatible with new Windows Vista (terrible!!!)No downloads available to upgrade compatibility. Pity! This Track Ball is not nearly as ergonomic, nor as smoothly running as its predecessor. Also, some of its functions do not work on Vista.
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