Oura JZ90-54216-08 Smart Ring - Gold - Size 8: Tracks over 50 health metrics accurately
For the busy professional or fitness enthusiast who wants to track health without the bulk of a smartwatch, the Oura Ring 4 offers a discreet way to monitor your well-being. It’s perfect for those who need accurate sleep and activity data during hectic days, like tracking overnight recovery after a tough workout or managing stress during back-to-back meetings. This ring isn’t just about numbers—it’s about giving you insights that fit seamlessly into your life, so you can make small adjustments for better health without constant reminders.
Powered by Smart Sensing, the Oura Ring 4 adapts to your body for precise tracking of over 50 metrics, including heart rate and sleep stages. You’ll notice the temperature sensor picks up subtle changes overnight, alerting you to potential issues before you feel unwell. With up to 8 days of battery life and a comfortable, water-resistant titanium design, you can wear it 24/7 without interruption. The two-way audio feature in the app lets you log voice notes about your day, while Alexa compatibility allows for hands-free updates. Use the included sizing kit to ensure a perfect fit, as Oura sizes differ from standard rings, and enjoy the first month of membership to unlock full insights into your health journey.
Features
- Up to 8 days of battery life
- Designed for 24/7 wear with water resistance
- Includes first month of membership
- All-titanium construction for durability
- Tracks over 50 health metrics accurately
General specs
- Brand: Oura
- Model: JZ90-54216-08
- Seller: Amazon
- ID: B0D9WVKXLK
- Product Dimensions: 0.87 x 0.87 x 0.28 inches
- Item Weight: 6.4 ounces
- Batteries: 1 Lithium Polymer batteries required. (included)
- Connectivity Technologies: Bluetooth
- Special Features: Heart Rate Monitor, Activity Tracker
- Other Display Features: Wireless
- Human Interface Input: Buttons
- Whats in the Box: Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide
- Manufacturer: Oura
- Country of Origin: Estonia
- Date First Available: October 3, 2024
- First listed by seller: 3/24/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
Shipping options
United States
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| Brand | Oura | Ultrahuman | FKGZJF | BIEMHA | SARUNN ER | Kuxlagz |
| Model | JZ90-54216-08 | AIR | B0FWJNV16Z | R11-25 Pro | ||
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| Price | $499.00 | $399.00 | $59.98 | $59.99 | $49.99 | $89.00 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | December 6, 2025 | July 19, 2025 | January 21, 2026 | January 21, 2026 | January 16, 2026 | January 21, 2026 |
| Size | 7 | 8 | 10 | 7 | 7 | |
| Material | Metal | Titanium Alloy | Titanium Alloy | Titanium Alloy | ||
| Battery Life | 3–5 d | 5–7 d | 5–7 d | 3–5 d | ||
| Connectivity | Bluetooth | Bluetooth | Bluetooth | |||
| Charging Method | Magnetic | Magnetic | Magnetic | |||
| OS Compatibility | Android 4.4, iOS 8.4 | Android, iOS | Android, iOS | |||
| Water Resistance | IP68 | IP68 | IP68 | 5ATM | ||