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Amazon.com: Fitiger Health Fitness Tracker Smart Ring, Activity Tracker Bracelet with Heart Rate Monitor/Sleep Monitor/Body Temperature/Pedometer/Blood Oxygen,Smart Band with APP/Bluetooth 5.0/IPX8 Waterproof : Sports & Outdoors
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This ambitious smart ring hopes to one day monitor chronic illnesses - The Verge
Oura Ring Review 2020: Is It Worth It? | The Strategist
