Oura Ring 4 Black - Size 8 Smart Ring
Available Options
For the active professional who wants to optimize health without constant device charging, the Oura Ring 4 offers seamless wellness tracking. It’s perfect for monitoring sleep quality and recovery after a tough workout or a stressful day.
This smart ring goes beyond basic fitness tracking to provide personalized insights for long-term health. The sensors detect subtle changes, like a slight dip in heart rate variability before you feel stressed, helping you adjust your routine proactively. With battery life lasting 5-8 days, you can wear it continuously without interruption, and it integrates with over 40 apps for a holistic view of your well-being.
Made from hypoallergenic titanium and waterproof up to 100 meters, it’s durable enough for daily wear. The Oura Membership program turns your data into actionable advice, supporting goals like better sleep or reduced stress. Experience a smarter way to care for your health with this discreet, powerful tool.
Features
- Tracks sleep, activity, stress, heart health, menstrual cycle, and more
- Battery life: 5-8 days
- Waterproof up to 328 feet
- Hypoallergenic titanium construction
- Integrates with over 40 apps
- Supports metric and imperial units
Product details
General specs
- Brand: Oura
- Model: Ring 4
- Material: Titanium
- Connectivity: Bluetooth
- Charging Method: Magnetic
- OS Compatibility: iOS, Android
If you are interested in more details, you can find full information on the seller's page.
Shipping options
Russia
Available Options
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Black - Size 10 | re:Store | $645.89 | Available | View |
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Silver - Size 12 | re:Store | $645.89 | Available | View |
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Black - Size 7 | re:Store | $645.89 | Available | View |
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Black - Size 11 | re:Store | $546.50 | Available | View |
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Black - Size 8 | re:Store | $546.50 | Available | Current |
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Black - Size 12 | re:Store | $645.89 | Available | View |
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Black - Size 11 | re:Store | $645.89 | Available | View |
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Silver - Size 8 | re:Store | $645.89 | Available | View |
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Silver - Size 11 | re:Store | $645.89 | Available | View |
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Silver - Size 11 | re:Store | $546.50 | Available | View |
Video Reviews
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Samsung SM-Q507NZKAXAR Black Fitness and sleep tracker
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Freeze2Trim ours ring sizing kit Black Continuous heart rate monitoring
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| Brand | Oura | TOMTOP JMS | RIFESI | Milavan | Samsung | Freeze2Trim |
| Model | Ring 4 | TK20 | SM-Q507NZKAXAR | ours ring sizing kit | ||
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| Price | $546.50 | $38.14 | $139.00 | $58.99 | $399.99 | $39.99 |
| Seller | re:Store | Joom | Amazon | Amazon | Amazon | Amazon |
| Update | January 9, 2026 | January 9, 2026 | December 9, 2025 | December 9, 2025 | December 6, 2025 | December 6, 2025 |
| Size | 8 | 8 | 8 | 7 | 8 | |
| Weight | 0.116, 0.183 | 0.240625 | 2.55 | 5.39 | ||
| Material | Titanium | Aluminum Alloy | Titanium Alloy | Titanium | ||
| Battery Life | 5–8 d | 7 d | 3–5 d | 7 d | ||
| OS Compatibility | iOS, Android | iOS, Android | Android, iOS | Android | ||
| Water Resistance | 100 m | 5ATM | IP68 | |||