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UP4 by Jawbone Health and Fitness Tracker with Amex Payments + Heart Rate Black Twist JB-UP4-BLACKTWIST - Best Buy
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Jawbone's new trio of Up2, Up3 and Up4 bands: Fitness tracking, heart rate and mobile payments (hands-on) - CNET
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Jawbone Outs Affordable Up2, Up3, And Up4: From Basic Wearable To American Express On Your Wrist | Tech Times
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