Oura Ring 4 Ceramic Smart Ring Health Activity Tracker - Midnight (Ring Size 9)
                        Barcode: 
                            6430060154568
                        
                
Vendors
- Virgin Megastore (Price: 1999.0)
Key Features
- Ceramic Construction: Durable, lightweight, and hypoallergenic with a scratch-resistant Midnight glaze. 
- Advanced Sensor Suite: Monitors heart rate (day + night), HRV, SpO₂, skin temperature, and stress levels. 
- Sleep Monitoring: Analyzes sleep stages, latency, disturbances, and overall sleep quality. 
- Readiness Score: Personalized daily guidance based on activity, rest, and physiological signals. 
- Live Heart Rate + Stress Detection: Real-time stress tracking with guided breathing support. 
- Cycle Insights: Tracks menstrual cycle phases using temperature fluctuations. 
- Activity Tracking: Step count, movement, calorie burn, and inactivity alerts. 
- Water Resistant: 100m (10 ATM), safe for swimming, showers, and sweat. 
- Battery Life: Lasts 4–7 days per charge; full recharge in 80 minutes. 
- App Compatibility: Works with iOS & Android; syncs with Apple Health and Google Fit. 
- Oura Membership: Unlocks full features, insights, and personalized recommendations. 
Specifications
| Feature | Details | 
|---|---|
| Model | Oura Ring Generation 4 – Ceramic Edition | 
| Color | Midnight (Dark Ceramic Finish) | 
| Ring Size | 9 | 
| Material | High-strength ceramic (non-metal, nickel-free) | 
| Sensors | Infrared PPG, NTC Thermometer, 3D Accelerometer, Gyroscope | 
| Tracked Metrics | Heart Rate, HRV, SpO₂, Skin Temperature, Stress, Activity | 
| Sleep Tracking | Sleep stages, latency, disturbances, quality score | 
| Battery Life | 4–7 days | 
| Charging Time | 80 minutes | 
| Water Resistance | 100m (10 ATM) | 
| Connectivity | Bluetooth Low Energy | 
| App Compatibility | iOS & Android; Apple Health & Google Fit integration | 
| Subscription Required? | Yes (Oura Membership required for full features) | 
| Weight | 4–6 grams (size-dependent) | 
| Warranty | 1-year limited warranty | 
| Technical Data | |
|---|---|
| Model | Oura Ring 4 Ceramic | 
| Color | Midnight | 
| Size | 9 | 
| Connectivity | Wireless, Bluetooth | 
| Material | High-strength ceramic (non-metal, nickel-free) | 
| Electronics | |
|---|---|
| Brand | Oura | 
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