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Oura Ring 4 is the latest evolution of the revolutionary smart ring. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that adapts to you, providing insights into over 30 biometrics, including sleep, readiness, activity, heart health, stress and women's health. With up to 8 days of battery life, you can forget it's even on.
Accuracy with Smart Sensing. Oura Ring 4 is powered by Smart Sensing, which adapts to your unique finger and activity.
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