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Amazon.com: Amazfit GTR 4 Smart Watch with GPS, Sleep Quality Monitoring, Step Tracking, Heart Rate & SpO2 Sensor, Alexa Built-In, Bluetooth Calls & Text, 14-Day Battery Life, AI Fitness App & Sports
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Amazon.com: Amazfit GTR 3 Smart Watch for Men, 21-Day Battery Life, Alexa Built-in, 150 Sports Modes & GPS, 1.39”AMOLED Display, SpO2 Heart Rate Tracker, Water Resistant, Fitness Watch for Android iPhone, Black :
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