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With one flick of its scroll wheel, the MX Revolution zooms past up to 10,000 spreadsheet lines. The secret is a hidden ball bearing: When it presses against the wheel inside the mouse, the wheel ratchets at the usual line-by-line pace. But when a motor pulls the ball away, the scroller spins freely, moving faster the harder you flick. It can even switch modes automatically based on the program. $100; logitech.com
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