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Amazon.com: Amazfit GTS 3 Smart Watch for Android iPhone, Alexa Built-In, GPS Fitness Sports Watch with 150 Sports Modes, 1.75” AMOLED Display, 12-Day Battery Life, Blood Oxygen Heart Rate Tracking, Black : Electronics
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Amazon.com: Amazfit GTS 4 Smart Watch for Men, Dual-Band GPS, Alexa Built-in, Bluetooth Calls, 150+ Sports Modes, Heart Rate SPO₂ Monitor, 1.75” AMOLED Display, Health Fitness Watch for Android iPhone, Black :
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