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Amazon.com: Nova 2023 Fitness Smart Ring - Bluetooth 5.1, Blood Oxygen Monitoring, Health Tracker for Heart Rate Monitor, Sleep, Pedometer, Body Temperature, IPX8 (Silver, 9#-19.0mm) : Sports & Outdoors
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Wellue Oxygen Finger Monitor,Wearable Ring Sleep Monitor with Heart Rate Measurement,Overnight Continuous Tracking,Bluetooth Pulse Oximeter with Free APP and PC Report,O2Ring - Walmart.com
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Amazon.com: Motiv Ring Fitness, Sleep and Heart Rate Tracker for iPhone and Android - Waterproof Activity and HR Monitor - Calorie and Step Counter - Pedometer. Ring Sizing Set and Redemption Kit
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