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Sleep Quality Detector: This bluetooth connection smart ring can detect your sleep time, patterns, and quality, helping you improve your sleep

RingConn Smart Ring

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Asixxsix Health Ring Fitness Tracker Smart Ring with Heart Rate, Sleep Tracking, Body Temperature, Pedometer, Blood Oxygen, Bluetooth 5.0, IPX8 Waterproof for Women Men (21#) - Yahoo Shopping

4 Pack Smart Ring with Charging Case Heart Rate Blood Pressure Oxygen Sleep Monitoring Body Pedometer Sports Smart Rings Health Fitness Tracker Rings IPX8 Bluetooth Android/iOS Wedding Gift - Yahoo Shopping

Jiawu Smart Ring, Waterproof Health Tracker, Bluetooth Ceramic Ring, Fitness Ring for Heart Rate, Temperature Detection, Blood Oxygen, Pedometer, Universal for Mobile Phone (18) : Sports & Outdoors

Diydeg Smart Health Ring, Bluetooth Fitness Tracker Smart Ring for Heart Rate, Body Temperature, Pedometer, Blood Oxygen, IPX8 Waterproof with Charging Cable for Women & Men (17) : Sports & Outdoors

Health Ring, Stainless Steel Wearable Bluetooth Finger Smart Ring Health Tracker Waterproof Rechargeable Blood Oxygen Monitor Fitness Ring for Men or Women (17) : Sports & Outdoors

RingConn Smart Ring

Asixxsix Health Ring Fitness Tracker Smart Ring with Heart Rate, Sleep Tracking, Body Temperature, Pedometer, Blood Oxygen, Bluetooth 5.0, IPX8 Waterproof for Women Men (21#) - Yahoo Shopping