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COOSPO Bluetooth & ANT+ Heart Rate Monitor Armband Optical HRM Sensor Waterproof IP67 Fitness Tracker Armband Compatible with Zwift, Wahoo Fitness, Endomondo, Peloton(One More Free Armband) : Sports & Outdoors
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Amazon.com: Fitbit Charge HR Wireless Activity Wristband (Black, Small (5.4 - 6.2 in)) : Sports & Outdoors
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A few quick thoughts on Fitbit's new activity trackers, GPS watch (with optical heart rate!) | DC Rainmaker
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