Jawbone UP3 is a sleeker, smaller, smarter fitness tracker

Jawbone UP3 is a sleeker, smaller, smarter fitness tracker The Jawbone UP3, on the left side of the wrist, is sleeker and smaller than the Jawbone UP24 (right).Jawbone is introducing two new fitness activity trackers, including its next-generation UP3 wristband wearable that will one day know when you're dehydrated, stressed and fatigued.
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