The product's shade and actual color may differ from what is shown in the picture, as the images are for illustrative purposes. The product description is general and may not include all the product's features.
Smart ring Oura Ring 4 | Size 12, dark gray color
3702596 JZ90-54218-12
6430060153561
This product is no longer in stock
Oura Ring 4
Smart ring designed for maximum comfort and health insights.
A new era of unmatched precision and comfort allows you to better understand your health – as intimately and personally as never before.
Thinner, smarter, and made for you
The precisely and qualitatively crafted Oura Ring 4 provides valuable insights into overall health – sleep, physical activity, stress, heart function, and more.
Up to 8 days of battery life
Depending on your Oura ring size and lifestyle, the Oura Ring 4 battery can last more than a week – so you can forget about charging for several days.
Live healthier and longer
The Oura membership and Oura ring work together – they help focus on long-term health goals and form habits that will last a lifetime. Personalized insights from Oura help understand what your body needs today and what it will demand in the future.
Sleep
Sleep rating
The answer to the question "how did you sleep last night?" Your rating is based on total sleep amount, heart rate variability (HRV), movement during the night, sleep regularity, and other factors.
Sleep phases
Wake up with a detailed overview of your deep, REM, and light sleep analysis from the previous night.
Blood oxygen monitoring
By monitoring your blood oxygen level during sleep, Oura can determine if you experience breathing disturbances.
Sleep mode recommendations
Oura reminds you when to start preparing for sleep to improve sleep quality.
Activity and physical readiness
Automatic activity recognition
From cycling or basketball training to housework – Oura automatically recognizes over 40 different activities and records heart rate to assess each of your movements.
Activity assessment
Analyze your physical activity level, consistency, and recovery time to understand if you find a healthy balance between movement and rest.
Personalized activity goals
Every day, Oura offers an individual physical activity goal based on your recovery level. Depending on your health priorities, the goal may focus on overall activity or calories burned.
Readiness
Readiness assessment
Your readiness assessment is based on changes in body temperature, heart rate, sleep, and other data to show how energetic you are today.
Detection of illness signs
Oura monitors temperature and heart rate fluctuations so you can notice potential signs of illness earlier.
Stress
Stress experienced during the day
Learn what stresses you out and what helps you recover. See how your daily movements, activities, and noted situations affect your stress level – and get back to balance faster.
Stress resilience
Monitor how your body recovers from daily physiological stress and learn to strengthen your resilience over time.
Heart health
Heart rate monitoring 24/7
Monitor how your heart rate changes day and night. Learn how your body responds to daily habits, food, stress, and environment.
Cardiovascular age
Quickly find out how your heart and vascular system ages compared to your actual age and what it may mean for long-term health.
Cardio capacity
Get an approximate VO₂ Max indicator – an assessment of how efficiently your body delivers and uses oxygen during intense physical exertion.
Heart rate variability (HRV)
Oura tracks your HRV to help understand if you have experienced stress, are sick, or simply need more rest.
Women's health
Cycle insights
Oura analyzes your body temperature changes to provide more accurate insights into your menstrual cycle and help understand what your body needs in each phase of the month.
Fertile period detection
No more guessing – get accurate data on expected fertility peaks, chances of conception, and ovulation – effortlessly.
Menstruation prediction
Find out when to expect your period using accurate predictions. Oura tracks body temperature changes and helps better monitor the cycle's progress.
Integration with Natural Cycles
The Oura Ring collaborates with Natural Cycles – the first FDA-approved natural planning contraception app, automatically synchronizing temperature data.
Partner integrations
Your Oura data can be linked with trusted fertility and cycle tracking apps like Flo, Clue, and others.
Specifications
| Material quality | Hypoallergenic titanium (inner and outer ring side) |
| Water resistance | Up to 100 m |
| Sensors | Red and infrared LEDs – for monitoring blood oxygen levels during sleep |
| Battery life | Up to 8 days |
| Charging time | 20–80 min. (depends on battery level) |
| Dimensions | Width: 7.90 mm Thickness: 2.88 mm (similar to a wedding ring) |
| Weight | 3.3–5.2 g (depends on ring size) |
| Compatibility | The Oura app is available in the following languages: English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Danish |
| Connection | Bluetooth® Low Energy |
| Certifications | FCC certified |
| Included | Each Oura Ring is sold with a charger and USB-C cable. |