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Amazon.com : POLAR VANTAGE M –Advanced Running & Multisport Watch with GPS and Wrist-based Heart Rate (Lightweight Design & Latest Technology), Black, M-L : Sports & Outdoors
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Amazon.com: COROS APEX 2 Outdoor GPS Watch, 1.2" Sapphire Titanium, 17 Days Battery Life, On-Wrist Navigation, Offline Maps, Heart Rate Monitor, Track Sleep, Running, Biking, Skiing, Climbing-Coral : Electronics
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Amazon.com: Garmin Forerunner 305 GPS Receiver With Heart Rate Monitor (Discontinued by Manufacturer) : Garmin: Electronics
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