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Amazon.com: Amazfit Bip Fitness Smartwatch, All-Day Heart Rate and Activity Tracking, Sleep Monitoring, Built-In GPS, 45-Day Battery Life, Bluetooth, Onyx Black : Electronics
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Amazon.com: Amazfit Bip 3 Pro Smart Watch for Android iPhone, 4 Satellite Positioning Systems, 1.69" Color Display, 14-Day Battery Life, 60+ Sports Modes, Blood Oxygen Heart Rate Monitor, Water-Resistant(Black) : Electronics
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