Ok it’s gimmicky I know, but still tempting : )
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Here’s how it works. You slip the FuelBand on your wrist, and sync it up with the Nike FuelBand app over bluetooth. Of course, you also have to set up an online account for yourself first, outlining your age, height, weight and other key details. The FuelBand displays a series of 20 LED lights that go from red-to-green as the user gets closer to their goal. The FuelBand can sync with the Nike website through a built-in USB, or wirelessly through Bluetooth to the iPhone app, to record and track progress every day. Whenever you like, you can hit the ‘sync’ button on the bracelet, and it will update the data directly to your iPhone. A full charge should be enough to power the bracelet for a few days. (via Hands-On With the New Nike Fuelband)

