Garmin fenix 5 Sapphire Edition Multi-Sport Training
Update: I had posted before about the cracking Heart Rate Monitor on my 5x. I contact Garmin and they replaced the watch. It was great customer. : GarminFenix
Garmin heart rate guide: Features, devices and accuracy
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Garmin Fenix 5/5S/5X In-Depth Review | DC Rainmaker
Amazon.com: Garmin fenix 5 Plus, Premium Multisport GPS Smartwatch, Features Color Topo Maps, Heart Rate Monitoring, Music and Contactless Payment, Titanium with Orange Band