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Griffin PowerMate Bluetooth

If you’ve been a Mac fan for years, you might remember Griffin’s original PowerMate. A simple silver dial, it was a neat USB accessory that let you scroll or change volume levels as you turned it. Now there’s a sequel: PowerMate Bluetooth ($60). Take one guess as to the big difference here.

That’s right, the cable has been cut; PowerMate Bluetooth now relies on Bluetooth 4.0 to hook up to your recent Mac running OS X 10.8 or later. The aluminum dial both spins and clicks, and can be programmed to work with any app. Some of the listed uses include shuttling through audio or video, scrolling, panning and zooming, resizing, and more. You can have hook up multiple units, each with their own features. No battery life is listed, but with Bluetooth 4.0, the two included AAA batteries should last for a reasonably long time.

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