New Smart Sensing technology provides enhanced accuracy, deeper personalization, and longer battery life.

Sleek, fully-titanium design and discreet sensors provide 24/7 comfort.

With 5-8 days** of battery life per charge, never miss a beat when it comes to tracking your health.

Oura Membership grows with you

Track over 50 health and wellness metrics, and get personalized insights into your sleep, activity, stress, metabolic, heart health, and women’s health. With innovative, AI-powered tools like Oura Advisor, get exclusive access to actionable insights that become increasingly tailored over time.

Heart Health
Sleep & Rest
Activity & Movement
Stress
Women’s Health
Metabolic

Tech Specifications

Sensors

Red and infrared LEDs measure blood oxygen levels

Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate

Digital sensor measures temperature trends

Accelerometer tracks movement and activity 24/7

Compatibility

Oura App is available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish

Supports metric and imperial units of measurement

Integrates with 40+ apps

Available on iOS and Android

Weight and Dimensions

Width: 7.90mm

Thickness: 2.88mm

Weight: 3.3 to 5.2 grams (depending on Oura Ring size)

Battery Life

5-8 days of battery life**

Typically charges in 20-80 minutes, depending on battery level

Quality Materials

Non-allergenic titanium on inner & outer surfaces

Seamless titanium interior

Water resistant up to 100m/328 ft

Minor scratches from regular wear are normal

Connectivity

Bluetooth Low Energy

Automatic firmware updates via Oura App

EMF-safe

Supports airplane mode

FCC-certified

* Your Oura Membership will automatically renew on a monthly or annual basis until you cancel. You may cancel at any time. Cancellation will take effect at the end of your current automatic renewal term. Canceling does not entitle you to a full or pro-rated refund of any paid fees. If you do not cancel before the end of any free trial or any prepaid membership term, your Oura membership will automatically renew and you will be charged at the applicable rate for your selected membership term.
** Battery life and longevity depend on Oura Ring size, Oura App settings, feature configuration, activity, battery age, usage, and many other factors; actual results will vary. Battery life and charge cycles vary by use and settings. Battery tests were conducted across various sizes and scenarios. See Oura Ring 4 Battery Life and Ring Battery Tips for more information.

CR - Oura Ring - FEB27

Smart Ring 4 Ceramic Midnight

Smart Ring 4 Gold

Smart Ring 4 Black

Smart Ring 4 Brushed Silver

Smart Ring 4 Rose Gold

Smart Ring 4 Ceramic Cloud