Oura Ring 4 Silver
Oura Ring 4 Silver
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Product Details
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Product Specifications |
Details |
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Sensors |
- Red and infrared LEDs measure blood oxygen levels - Green and infrared LEDs alternate to measure heart rate, heart rate variability (HRV), and respiration rate 24/7 - Digital sensor measures temperature trends - Accelerometer tracks movement and activity 24/7 |
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Compatibility |
- Oura App available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish - Supports metric and imperial units of measurement - Integrates with 40+ apps - Compatible with iOS and Android |
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Weight and Dimensions |
- Width: 7.90 mm - Thickness: 2.88 mm, similar to a wedding band - Weight: 3.3–5.2 g, depending on ring size |
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Battery Life |
- 5–8 days of battery life* - Typically charges in 20–80 minutes, depending on battery level |
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Quality Materials |
- Non-allergenic titanium on inner and outer surfaces - Seamless titanium interior - Water resistant up to 100 m (328 ft) - Minor scratches from regular wear are normal |
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Connectivity |
- Bluetooth Low Energy - Automatic firmware updates via the Oura App - EMF-safe - Supports airplane mode - FCC-certified |
- Information Booklet
- Oura Ring 4
- Oura Ring 4 Charger
- Quick Start Guide
- USB-C Cable
- 1 Year Warranty | Human Error Not Covered
Oura Ring's accuracy has been tested against gold-standard lab measurements in independent, peer-reviewed studies, from heart rate and HRV to sleep staging. Continuous readings from your finger give Oura a strong, reliable signal delivering insights you can trust.
We recommend you use an Oura Ring sizing kit before selecting your Oura Ring size. The kit includes plastic ring sizers corresponding to Oura Ring sizes, which differ slightly from standard ring sizes (note: half sizes are not available).
For accuracy, wear the sizing ring for at least 24 hours, including while sleeping, before finalizing your size. If you’re between sizes, we recommend choosing the smaller size for a more secure fit.