Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
Oura JZ90-54217-09 Silver, size 9 Ring 4
Available offers (8)
Current
Silver, size 9
Retailer
€299.89
Available to order
Price history by offer
Volatility: MediumFeatures
- Tracks 50+ health metrics
- Smart Sensing adaptive accuracy
- 5-8 day battery life
- All-titanium water resistant design
- Oura membership required
General specs
- Brand: Oura
- Model: JZ90-54217-09
- Seller: Retailer
- ID: B0D9WWB3WX
- Size: 9
- Brand: OURA
- Model: Oura Ring 4
- Width: 1.0236220462 inches
- Design: 24/7 wear
- Height: 0.2755905509 inches
- Length: 1.0236220462 inches
- Screen: No screen
- Sizing: Requires Oura Ring 4 Sizing Kit
- Sensors: Smart Sensing technology
- Material: Titanium
- Vibration: No vibrations
- AI Advisor: Yes
- Membership: First month free, then $7.99/month
- Battery Life: Up to 8 days
- Release Date: 2024-10-15
- Compatibility: Android, iOS
- Health Metrics: Sleep, Activity, Stress, Heart Health, Metabolic Health, Women's Health
- Number of Items: 1
- Water Resistance: Water resistant
- First listed by seller: May 29, 2025
If you are interested in more details, you can find full information on the seller's page.
Price History for seller Retailer
Shipping options
Delivery to 
United States
United States
Available
You juggle a busy schedule and want to feel your best. The Oura Ring 4 slips onto your finger and gets to work. This smart ring tracks your sleep, activity, and recovery automatically. You never have to tap a screen or take it off to charge. With up to 8 days of battery life, it fits seamlessly into your day and night. The all-titanium design feels weightless, even on sensitive skin.
It goes beyond fitness tracking. It is like having a private health assistant. In the morning, the app delivers a clear readiness score. You see exactly how well your body recovered overnight. One evening, you notice a higher resting heart rate after a stressful day. The ring’s trends help you connect the dots. You decide to try deep breathing before bed, and your sleep quality improves. The AI advisor learns your patterns and offers personalized tips, not generic advice.
This ring becomes a quiet partner in your wellness journey. It respects your attention by staying silent and screen-free. It nudges you toward better habits without interruption. The Oura Ring 4 turns raw data into practical steps you apply every day. It helps you understand your body so you show up fully for the people and projects that matter.
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| Brand | Oura | Herz | Oura | Victormont | Oura | UniJethro |
| Model | JZ90-54217-09 | P1 | JZ90-1003-06 | Gen-11 | JZ90-1003-09 | SR11M |
| Rating |
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| Price | €299.89 | €53.39 | €299.21 | €88.98 | €266.08 | €35.59 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | May 15, 2026 | May 9, 2026 | Mar 21, 2026 | Mar 21, 2026 | Mar 21, 2026 | May 29, 2026 |
| Battery Life | Up to 8 days | 20 days with wireless charging case | 5-7 days | |||
| batteries | 1 Nonstandard Battery batteries required. (included) | 1 Lithium Ion batteries required. (included) | 1 Lithium Ion batteries required. (included) | |||
| Item Weight | 0.127 ounces | 7.8 ounces | 5.3 ounces | 7.8 ounces | ||
| Country of Origin | Estonia | China | Estonia | |||
| Date First Available | January 19, 2024 | October 28, 2024 | January 19, 2024 | |||
Oura JZ90-54217-09 Silver Tracks 50+ health metrics
€299.89
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