Oura Ring 4

Note: Also available in Amazon: https://amzn.to/4afAaPB

Oura Membership:
(1 month free) Monthly subscriptions start at $5.99/month thereafter.

Oura Ring 4 is the next evolution of the revolutionary smart ring, designed to help you get up close and personal with your health. Oura Ring 4 is built around a breakthrough sensing technology, Smart Sensing, which adapts to your finger to deliver accurate, continuous data, day and night.

Choose your size:

• Free Sizing Kit (recommended)
• Specific size (Size 4-15)

Hardware

Oura Ring 4 features a sleeker, fully titanium design and recessed sensors on the interior, enhancing both durability and wearability.

Oura Ring 4 is available in one design and six finishes: Black, Silver, Stealth, Brushed Silver, Gold, and Rose Gold. It has an expanded size range, now available in sizes 4-15. We do not offer half sizes.

The sizing for Oura Ring 4 is slightly different from Oura Ring Gen3. If you're switching between these align your Oura Ring or uncertain about your size, make sure to use the right Oura Sizing Kit for an accurate fit. The Oura Ring 4 Sizing Kit includes white ring sizers, and the Oura Ring Gen3 Sizing Kit includes black ring sizers.

For the best fit and most accurate readings, align your ring so that the sensors are against the palm side of your finger.

Sensors

• Smart Sensing is a new sensing platform designed to give you the most complete picture of your health. The research-grade sensors work with an algorithm that adapts to the unique structure and skin tone of your finger and your current activity to deliver the most accurate, continuous data, day and night—all while optimizing battery life
• Red and infrared LEDs measure blood oxygen while you sleep
• Green and infrared PPG sensors alternate to measure heart rate and heart rate variability 24/7 and respiration rate during your sleep
• Digital temperature sensor measures body temperature variations
• Accelerometer tracks movement and activity 24/7

External Surface Materials

• Titanium with physical vapor deposition (PVD) coating in Black, Silver, Brushed Silver, Gold, and Rose Gold
• Titanium with Diamond-like Carbon (DLC) coating in Stealth
  

Inner Surface Materials

• Non-allergenic, titanium inner shell. This is a medical grade, BPA-free inner surface
• Shock resistance and bonding between printed circuit board and Oura Ring outer frame
  

Connectivity

• Bluetooth Low Energy (Bluetooth Smart®)
• EMF-Safe and allows Airplane Mode
• FCC certified
  

Other Specifications

• Battery: Up to 8 days. 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 Ring Battery Tips for more information
• Width: 7.9mm
• Thickness: ~2.88mm
• Weight: 3.3-5.2 grams (depending on ring size)

See more information in our Product Safety & Use article.

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