Oura Smart Ring 4 Size 8 - Rose Gold (JZ90-54219-08)

Oura Ring 4 – Smart Health Tracking, Evolved

Introducing Oura Ring 4, the latest evolution of the revolutionary smart ring designed to bring you closer to what matters most: your health. Crafted with an updated all‑titanium design and powered by Smart Sensing, Oura Ring 4 doesn’t just measure your biometrics—it adapts to you. Gain continuous insights into over 30 health metrics, including sleep, readiness, activity, heart health, stress and women’s health. With up to 8 days of battery life, it monitors your well‑being quietly, comfortably and effortlessly.

Key Features

Smart Sensing Accuracy

Powered by Smart Sensing, Oura Ring 4 adapts to your unique finger and daily activity to deliver accurate, continuous biometrics day and night.

Designed for 24/7 Wear

• Updated, more comfortable fit
• Water‑resistant
• First all‑titanium smart ring for durability with a gentle touch, suitable even for sensitive skin

Long‑Lasting Battery

Enjoy up to 8 days of battery life, with no screens or vibrations—just pure, uninterrupted health monitoring.

Health & Wellness Tracking

Sleep

Receive in‑depth sleep analysis every morning, including sleep staging, blood oxygen levels, HRV, and nighttime heart rate.

Activity

Whether you’re training or staying active throughout your day, Oura tracks steps, calories burned, daily movement and workouts, helping you balance activity and recovery.

Readiness

The Oura Readiness Score interprets over 30 body signals—including temperature, heart rate, HRV and sleep—to help you understand how prepared you are for the day ahead.

Stress

Identify signs of stress and understand how well your body manages it. Learn when to incorporate more recovery and self‑care practices.

Illness Detection

Monitor shifts in your temperature and heart rate to help identify early signs of potential illness.

Women’s Health

Track how your cycle influences mood, sleep, activity and more. Understand body changes throughout your cycle and predict your period up to 30 days in advance.

Heart Health

Track daily heart rate and HRV, and access insights such as Cardiovascular Age and Cardio Capacity to support your overall heart health.

Product Specifications

• Accessories Included: Oura Ring, Charging Dock & USB Cable
• Battery Capacity: 14.5mAh
• Battery Life: Up to 8 days
• Charging Time: 80 minutes
• Power Supply: Rechargeable battery
• Sensors & Trackers: Heart rate, temperature
• Strap Colour: Rose Gold
• Vibration Alert: No
• Water Resistance: Up to 100m / 328ft
• Materials: Non‑allergenic titanium (inner & outer surfaces), seamless titanium interior
• Dimensions:
  • Width: 7.90 mm
  • Thickness: 2.88 mm (similar to a wedding band)
  • Weight: 3.3–5.2 g (depending on ring size)

Sensors

• Red & infrared LEDs: Blood oxygen measurements
• Green & infrared LEDs: 24/7 heart rate & HRV monitoring, respiration rate
• Digital sensor: Temperature trends
• Accelerometer: 24/7 movement & activity tracking

Minor scratches from regular wear are normal.

Compatibility

• Oura App supports English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch and Danish
• Supports metric & imperial units
• Integrates with 40+ apps
• Available on iOS & Android

Connectivity

• Bluetooth Low Energy
• Automatic firmware updates via the Oura App
• EMF‑safe
• Airplane mode supported
• FCC‑certified

Important