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Amazon.com: Amazfit GTR Mini Smart Watch for Men,14-Day Battery Life, Sports Watch with GPS, 5 Satellite Positioning Systems, Fitness Health Tracker with Heart Rate, SPO₂ Monitoring,5 ATM Water Resistance, Black : Electronics
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Amazfit GTR Smartwatch with GPS+Glonass, All-Day Heart Rate Monitor, Daily Activity Tracker Rate and Activity Tracking, 10-Day Battery Life, 12-Sport Modes, 42mm, Moonlight White - Walmart.com
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AMAZFIT GTR 2e ACCURACY TEST and REVIEW | GPS - Active Heart Rate - Resting Heart Rate Test - YouTube
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Amazon.com: Amazfit GTR Smartwatch, 1.39'' AMOLDED Display 24/7 Heart Rate Monitor, 24 Day Batter Life, 12 Sports Modes(47mm, GPS, Bluetooth), Titanium : Electronics
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