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Amazon.com: Garmin 010-03717-49 Forerunner 235 with Wrist Based Heart Rate Monitoring, Forest Blue/Black : Electronics
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Garmin Forerunner 235 GPS Running Watch & Activity Tracker Black and Grey Wearable Technology - Newegg.com
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Forerunner 235 heart rate blank until rebooted - Forerunner 230/235 - Running/Multisport - Garmin Forums
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