Oura Ring 4 — Silver
The most accurate consumer health ring. 18 sensors track sleep staging, HRV, readiness, and 20+ biometrics 24/7.
Key Benefits
- 18 sensors with clinical-grade sleep staging accuracy
- HRV, resting heart rate, SpO2, and skin temperature monitoring
- 7-day battery life, titanium construction, water-resistant to 100m
- FDA-cleared for atrial fibrillation detection
Full Description
The Oura Ring 4 sets the standard for wearable health intelligence. With 18 sensors and algorithms validated against clinical-grade polysomnography, it delivers category-leading accuracy for sleep staging, HRV, resting heart rate, blood oxygen saturation, and body temperature. The daily Readiness Score synthesizes your overnight data into an actionable metric used by over 2 million members — from elite athletes to NASA researchers. Includes 1 month free Oura membership ($5.99/month thereafter).
How to Use
Wear on any finger. Charge for 20–80 minutes daily (7-day battery). Sync with the Oura app each morning for personalized recovery and readiness insights.
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