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Noise Luna is a tiny smart ring that can track sleep and monitor heart rate | Technology News - The Indian Express
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CENAP Fitness Smart Ring, Sleep Tracker Ring with Special APP and G-sensor, Magnetic Charging, Waterproof and Energy Saving, For Monitoring Health, Body Temperature, Sleeping and Heartbeat, Fitness : Amazon.co.uk: Sports & Outdoors
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Oura ring review 2022: We tested the generation 3 model to see if it lives up to the hype | The Independent
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