Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
Oura JZ90-54216-08 Gold, size 8 Ring 4 Gold Size 8
Available offers (8)
Current
Gold, size 8
Retailer
€355.07
Available to order
Price history by offer
Volatility: MediumFeatures
- Tracks 50+ health metrics
- 5-8 day battery life
- Heart rate & blood oxygen monitoring
- Skin temperature sensor
- Smart Sensing adaptive technology
- No distracting screens or vibrations
- Comfortable 24/7 wear design
- All-titanium, water resistant to 100m
- Ultra-lightweight (0.12-0.18 oz)
- Bluetooth LE, EMF-safe, airplane mode
- iOS & Android app with 40+ integrations
- Requires Oura sizing kit
- Includes 1-month membership trial
General specs
- Brand: Oura
- Model: JZ90-54216-08
- Seller: Retailer
- ID: B0D9WVKXLK
- Size: 8
- Brand: OURA
- Model: Oura Ring 4
- Width: 0.8661417314 inches
- Height: 0.2755905509 inches
- Length: 0.8661417314 inches
- Sensors: Smart Sensing
- Material: Titanium
- Membership: First month included, then $7.99/month
- Battery Life: 5 to 8 days
- Release Date: 2024-10-15
- Compatibility: Android, iOS
- Health Metrics: Sleep, Activity, Women's Health, AI Advisor, Stress, Heart Health, Metabolic Health
- Design Features: All-titanium, No screens, No vibrations, 24/7 wear
- Water Resistance: Water resistant
- First listed by seller: March 24, 2025
- Compare the Rings: Oura 4 or Galaxy? Comparison with: Samsung SM-Q509NZDAXAR Titanium Gold Sizing kit for accurate fit
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 want to optimize your health without staring at another screen. The Oura Ring 4 is a discreet companion that tracks over 50 metrics, including sleep, activity, heart rate, and temperature, from your finger. It's for the busy professional, the health-conscious parent, or anyone seeking a clearer picture of their well-being.
Unlike wearables that demand constant attention, Oura works silently. It interprets your body's signals and delivers a simple Readiness Score each morning. You know whether to push hard in a workout or prioritize rest. The ring's advanced sensors even catch subtle temperature changes, hinting at illness days before you feel it.
Comfort keeps you wearing it 24/7. The all-titanium design feels light and gentle on skin, even in the shower or pool. You charge it every 5 to 8 days, so it rarely leaves your finger. The included membership gives you an AI health coach that translates complex data into personalized advice. Oura helps you connect the dots between your habits and your health, so you wake up ready for what matters.
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| Brand | Oura | Rugsoul | Victormont | UniJethro | Duobuy | Herz |
| Model | JZ90-54216-08 | Gen-11 | SR11M | Smart Ring | P1 | |
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| Price | €355.07 | €61.40 | €88.98 | €35.59 | €53.38 | €53.39 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | May 13, 2026 | Mar 21, 2026 | Mar 21, 2026 | Mar 21, 2026 | Mar 21, 2026 | May 9, 2026 |
| Battery Life | 5 to 8 days | 20 days with wireless charging case | 5-7 days | |||
| batteries | 3 AAA batteries required. | 1 A batteries required. (included) | 1 Nonstandard Battery batteries required. (included) | |||
| Item Weight | 1 Ounces | 5.3 ounces | 3.84 ounces | 0.127 ounces | ||
| Package Dimensions | 1.57 x 1.18 x 0.79 inches | 3.98 x 3.94 x 1.85 inches | 3.07 x 2.91 x 1.85 inches | 15.55 x 12.56 x 9.33 inches | ||
Oura JZ90-54216-08 Gold Tracks 50+ health metrics
€355.07
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