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Amazon.com : Pyle Smart Fitness Heart Rate Monitor - Digital Sports Wrist Watch Activity HR Tracker w/ Chest Strap, 3D Sensor, EL Backlight, Alarm, Used in Exercise or Running, For Men and
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Amazon.com: Polar Ignite - GPS Smartwatch - Fitness watch with Advanced Wrist-Based Optical Heart Rate Monitor, Training Guide, Waterproof : Electronics
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