Oura Ring 4 Black size 12
Oura Ring 4 Black size 12
Oura Ring 4 - Elegant smart ring for continuous health monitoring
The Oura Ring 4 smart ring revolutionises the way you feel about your body. Inside a small, sleek ring of lightweight titanium is technology with research-grade precision to help you sleep better, regenerate more effectively, and understand what's really going on beneath the surface. You can monitor key areas like sleep, activity and fitness, overall readiness, heart health or stress levels with accuracy, that regular wearables can hardly offer - and all this straight from the fingertips, where biometrics are most accurate. The Oura Ring 4 smart ring offers exceptional accuracy with advanced sensors, up to 8 days of battery life, water resistance to 100 meters and connectivity to over 40 apps. It communicates via Bluetooth Low Energy and is fully compatible with both Android and iOS devices. In addition, it supports metric and imperial units and multiple languages, including Czech English, German and Japanese. The Oura Ring 4 smart ring puts all the important information about your body at your fingertips - literally.
Key features of the Oura Ring 4 Black size. 12
- The ring provides exceptionally accurate data thanks to embedded, research-quality sensors
- Battery lasts up to 8 days and can be charged in just 80 minutes
- Water resistance to 100 meters allows you to wear the ring without having to take it off
- Smart Ring App in Czech
- Oura Ring automatically detects more than 40 different types of movement and activities
- Smart ring gives you a clear overview of your sleep quality or recovery
- Bluetooth Low Energy for energy-efficient connectivity
- Oura Ring 4 helps monitor women's health in detail
- Ring data can be easily linked to more than 40 apps
- The ring is fully made of lightweight titanium
- Oura Ring 4 supports multiple languages and units of measure
A smart ring for every lifestyle
Whether you're a shift doctor, a full-time parent, a manager under pressure, or an athlete looking to optimize performance - the Oura Ring 4 adapts to your rhythm. It's lightweight, waterproof and so unobtrusive you can wear it 24/7 without restriction. It gives you a continuous overview of how your body is responding to daily challenges. It suits both business outfits and sportswear and will become a stylish part of your life.
Accuracy at laboratory level
The finger is the ideal place for measurement - that's why Oura Ring 4 offers exceptionally accurate data from more than 20 biometrics that affect your overall health and well-being. With the ring, you can monitor resting heart rate with 99.6% accuracy, heart rate variability with 98% reliability, and even body temperature changes with 0.13°C sensitivity. Every detail your body sends is captured and translated into a meaningful recommendation that lets you know what your body needs before you feel it. The Oura Ring 4 features embedded medical research-grade sensors that continuously monitor key indicators of your health. Red and infrared LEDs measure blood oxygen levels during sleep, while green and infrared LEDs alternately monitor heart rate, its variability and respiratory rate. The digital temperature sensor detects even the smallest changes in body temperature, which can be a signal of stress, illness or hormonal changes. Movement and activity are taken care of by an accelerometer that monitors your body 24/7.
Eight-day operation without recharging
The Oura Ring 4 smart ring fully charges in just 80 minutes and lasts for up to 8 days without the need for daily recharging. So you can monitor your health around the clock, whether you're at home, at work or on the go. The ring works quietly in the background and requires no special care, allowing you to concentrate on yourself.
Durable titanium for everyday wear
The Oura Ring 4 smart ring is made entirely of high quality titanium, lighter than a regular wedding band, hypoallergenic and designed to last for years of wear. The ring is water resistant to a depth of 100 meters, can withstand extreme conditions from sauna to ice baths and thanks to its durability will not disappoint you even in a demanding lifestyle. It's an accessory that not only looks good, but also lasts a lot. In addition, recessed sensors ensure a comfortable fit without any disturbance during the day and sleep.
Oura Ring 4 handles accurate sleep measurement
Comprehensive assessment of your sleep
Every morning, Oura Ring 4 provides you with a clear sleep score that answers a simple but essential question: How did you sleep? The resulting score is based on sleep duration and quality, heart rate variability, nocturnal movement, sleep regularity and other factors. You'll get an objective view of how your body has regenerated during the night - and what to change for even better rest.
Overview of sleep stages
Each morning you'll get a detailed overview of how much of the night you spent in light, deep and REM sleep. With this analysis, you will understand not only the overall length of your sleep, but also its quality and restorative potential. Oura Ring 4 tracks sleep stages with high accuracy, so you can be sure you know when your body is actually resting.
Nocturnal monitoring of blood oxygenation
Oura Ring 4 measures blood oxygen level (SpO₂) during sleep thereby helping to detect any breathing irregularities or reduced saturation that may negatively affect the quality of your rest. This feature gives you a clearer picture of how your body functions during the night, even when you yourself are asleep.
Personalised sleep recommendations
Based on the measurements, the smart ring then recommends tips and tricks for getting the best sleep in the app. For example, the appropriate time to go to bed and how long you would need to sleep.Smart ring monitors your activities and fitness
Automatic motion detection
Oura Ring 4 automatically recognizes more than 40 different activities - from cycling and running to doing chores or playing basketball. Based on your heart rate and movement patterns, the ring accurately assesses how much energy you've expended even if you don't start the activity yourself. This way you won't lose track of any movement and every step counts.
Activity evaluation
With the Activity Score feature, you get a clear assessment of your daily activity, long-term consistency and recovery time. Oura monitors how you move, how regularly you are active and whether you are giving your body enough rest. This balanced view will help you find a healthy balance between exercise and rest.
Daily activity goals tailored to your recovery
Oura Ring 4 sets an individual activity goal each day based on your current state of recovery. The goal automatically adapts to your needs - sometimes emphasizing movement, other times burning calories, or more rest if your body needs to rest.Ready for a new day
Measuring body readiness
Readiness Score combines data on your sleep, heart rate, heart rate variability and temperature changes, to assess how well your body is prepared to handle the stresses of a new day. Instead of guessing, you wake up every day with a clear idea of whether it's time to exercise or regenerate. This allows you to better plan your activities and listen to your body's real needs.
Early recognition of possible disease
The Oura Ring 4 monitors subtle changes in your body temperature and heart rate, which may indicate that your body is struggling with an incipient illness. With these signals, you can react early, slow down and support recovery before symptoms become fully apparent. Oura helps you better understand your body's signals and prevent unnecessary exhaustion.Stress measurement
Overview of daily stress and your recovery
The Oura Ring 4 helps you identify what increases your stress levels during the day and what contributes to your recovery. By linking to movement, activities and personal markers, you can easily see how your daily habits affect your mental and physical performance. With this data, you can plan your day better and learn to get back into balance faster.
Evaluation of recovery from stress
Oura Ring 4 continuously evaluates how well your body is recovering from the daily physiological stress. With long-term monitoring, you can understand what benefits your resilience and what weakens it. This allows you to gradually build a stronger response to stress, regenerate better and strengthen the overall balance of body and mind.Oura Ring 4 analyzes heart health
Continuous heart rate measurement
Oura Ring 4 monitors your heart rate 24/7, providing an accurate picture of how your heart is responding to your daily habits. the food, the stress and the environment. Thanks to this data, you can easily understand what benefits your body and what puts a strain on it. You will gain a deeper insight into the functioning of your body.
Analysis of the biological age of the heart
The Oura Ring 4 helps you find out what the real age of your cardiovascular system is compared to your biological age. Based on long-term monitoring data such as heart rate, heart rate variability and other indicators, you'll get an overview of how your heart is doing - and what it could mean for your future health. The earlier you know your condition, the better you can prevent risks and support your vitality.
Physical fitness analysis using VO₂ Max
Oura Ring 4 can estimate your cardiorespiratory capacity (VO₂ Max), how efficiently your body delivers and uses oxygen during strenuous physical activity. This indicator is one of the key metrics of endurance and overall fitness. Regular monitoring of VO₂ Max will help you better understand your physical condition and track long-term performance trends.
Heart rate variability under supervision
Oura Ring 4 monitors heart rate variability (HRV), which is a sensitive indicator of how your body copes with stress, illness or strain. Based on this data, you can easily see if you need to slow down, rest more, or are in good shape for activity. HRV helps you to listen to your body and adapt your daily routine to its real needs.Monitoring women's health
Accurate menstrual cycle reports
By tracking changes in body temperature, Oura Ring 4 gives you a more accurate view of your menstrual cycle. It helps you recognise the different phases of the cycle and understand what your body needs at different times of the month - whether it's more rest, a different type of activity or an adjustment to your daily routine.
A more accurate estimate of the fertile period
Oura Ring 4 helps you to more reliably estimate peak fertile periods, probability of conception and detected ovulation time - all automatically, without the need for manual data entry. Based on temperature trends and other biometric data, you will get accurate and personalised information to help you make family planning decisions.
Accurate prediction of menstruation
The Oura Ring 4 tracks drops in body temperature and other physiological changes to more accurately predict the onset of menstruation. Instead of inaccurate estimates, you have reliable data to help you better prepare for the different phases of your cycle and adapt your daily routine accordingly.
Integration with Natural Cycles
Oura Ring 4 connects to the Natural Cycles app - the world's first FDA-approved contraceptive method that works by tracking body temperature. Thanks to the automatic synchronization of data from the ring to the app, you don't have to manually enter anything. You get a reliable and scientifically based tool for natural family planning, which is both discreet and easy to use.
Connecting to your favourite apps
You can easily link your Oura Ring 4 data to fertility and cycle tracking apps you trust - like Flo, Clue and more. The integration gives you an even more comprehensive view of your health and cycle without having to enter data twice.Smart Ring compatibility and connectivity
The Oura app is available in several world languages, including Czech, English, Finnish, Japanese, German, French, Spanish and Italian, and supports both metric and imperial units. It integrates seamlessly with over 40 popular apps, allowing you to connect your data with the tools you already use. The ring uses Bluetooth Low Energy for economical wireless connectivity, is electromagnetic radiation safe and allows you to turn on airplane mode. FCC certification is also a matter of course.
Oura Ring charger
Each Oura Ring comes with one size-specific charger and USB-C cable.
Accurate data about your health with Oura Membership
With an Oura membership, you get access to advanced data and personalized recommendations to help you better understand your body. So you can track sleep, daily activity, fitness levels, stress, heart health and women's health - all in one app. Based on this data, Oura will help you decide when to slow down and when you can perform at your peak every day. New members get the first month free, after that it costs €5.99 per month.
Find out your size before buying
Before ordering the Oura Ring 4 smart ring, we recommend you first purchase the Oura Sizing Kit - a handy sizing kit. Thanks to it, you can comfortably try on different sizes at home and see which one fits you best. Once you know your size, feel free to order your Oura Ring 4.
Specifications
Purpose and compatibility
Connectivity and sensors
Functions
Software
Battery life and storage
Included
Size and design
Select a brand/model
| Code: | OURAr4b12 |