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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 U Smart Watch for Women, Health & Fitness Tracker with 60+ Sports Modes, 9-Day Battery Life, Blood Oxygen Heart Rate Sleep Monitor, 5 ATM Water Resistant, for iPhone Android
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