Oura Ring 4 – Advanced Health Tracking Smart Ring with Titanium Build & 8-Day Battery

Crafted with a fully titanium shell and medical-grade inner materials, the Oura Ring 4 sets a new standard for smart rings in health monitoring. Featuring a sleek, recessed sensor layout and a compact, lightweight profile, it delivers continuous, research-grade data tracking without compromising comfort. Designed to work seamlessly with your lifestyle, this wearable provides deep health insights, including heart rate variability, blood oxygen levels, advanced sleep metrics, and more—all powered by an intelligent Smart Sensing platform.

With 24/7 monitoring capabilities and an extended battery life of up to 8 days, the Oura Ring 4 ensures your wellness data is never interrupted. The precision of its adaptive algorithm is enhanced by an expanded size range (4–15), and its durable construction withstands the demands of daily wear, exercise, water exposure, and temperature extremes. Whether you're monitoring cardiovascular performance, managing stress, or gaining insights into your menstrual cycle, the Oura Ring 4 is built to support holistic well-being.

Key Features

Smart Sensing Platform
The Oura Ring 4 uses a dynamic Smart Sensing platform that adapts to your unique physiology and daily activity. This system selectively activates sensors based on signal quality, maximizing accuracy while preserving battery life.

Continuous Health Monitoring
Equipped with green, red, and infrared LEDs along with a digital temperature sensor and an accelerometer, the ring provides real-time insights into heart rate, blood oxygen levels, body temperature variation, activity, and respiration.

Durable, Lightweight Design
Made from titanium with a Diamond-like Carbon (DLC) coating and recessed sensors, the ring combines ruggedness with a refined finish. Despite its strength, the ring weighs only 3.3 to 5.2 grams, ensuring all-day comfort.

Comprehensive Wellness Insights
Integrated with the Oura app, the ring delivers reports on sleep quality, cardiovascular age, VO2 Max (Cardio Capacity), stress levels, and more. Additional features include Pregnancy Insights, Cycle Insights, and dynamic activity detection.

Long-Lasting Battery & Easy Charging
The battery supports up to 8 days of operation, with recharge times typically between 20 to 80 minutes using a USB-C to USB-C charger. The ring’s power management is designed to adjust based on usage and sensor engagement.

Specifications

• Style: 1 style

• Design & Material: Fully titanium exterior and interior, recessed sensors at 0.3mm

• Sizes Available: 4–15 (no half sizes)

• Battery Life: Up to 8 days (varies by settings and usage)

• Charging Time: 20–80 minutes

• Charger: Grey, square; USB-C to USB-C

• Dimensions:

  • Width: 7.9mm

  • Thickness: ~2.88mm

  • Weight: 3.3–5.2 grams (varies by size)

• Water Resistance: 100m / 328ft, safe for sauna and water sports (not for diving)

• Operating Temperature: -10 to 54 °C / 14 to 129 °F

• Sensors:

  • Red/infrared LEDs for blood oxygen during sleep

  • Green/infrared PPG for 24/7 heart rate and respiration

  • Digital temperature sensor

  • 3D accelerometer

• Connectivity:

  • Bluetooth Low Energy (Bluetooth Smart®)

  • EMF-Safe with Airplane Mode

  • FCC certified

• Inner Surface: Non-allergenic, medical-grade titanium; BPA-free

• Shock Resistance: Bonded PCB and outer frame

• Software Features with Active Membership:

  • Sleep analysis

  • 24/7 heart rate tracking

  • Third-party app integration (e.g., Strava)

  • Temperature trends

  • SpO₂ sensing

  • Cardiovascular age & VO₂ Max

  • Cycle & Pregnancy Insights

  • Stress analysis

  • Activity detection

  • Oura Labs access

  • Multi-period health reports

Conclusion
The Oura Ring 4 stands as a sophisticated health tracker engineered to deliver medical-grade data in an elegant, resilient design. With features tailored to monitor key health indicators, paired with seamless app integration and superior battery performance, this smart ring supports comprehensive wellness with minimal intrusion. Designed for everyday wear, it offers valuable insights to help users optimize their physical, emotional, and physiological well-being.