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Black Oura Ring 4
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Oura Ring 4
Smart Health Tracking | Sleek Titanium Design | Personalised Insights
Our Most Personal Smart Ring Ever
The Oura Ring 4 is designed to help you better understand your body, with advanced health tracking, enhanced accuracy, and personalised insights that support your sleep, activity, stress, and overall wellbeing.
Sleeker, Smarter & Made for You
Featuring new Smart Sensing technology, Oura Ring 4 delivers deeper personalisation and improved accuracy, all within a sleek, fully titanium design made for comfortable 24/7 wear.
Track Over 50 Health Metrics
With an Oura Membership, you can monitor more than 50 health and wellness metrics, including sleep, activity, stress, heart health, metabolic health, and women’s health.
Long-Lasting Battery Life
With up to 5–8 days of battery life per charge, the Oura Ring 4 helps you stay connected to your health insights without constant charging.
Advanced Sensor Technology
- Red and infrared LEDs measure blood oxygen levels
- Green and infrared LEDs track heart rate, HRV, and respiration rate
- Digital temperature sensor monitors temperature trends
- Accelerometer tracks movement and activity 24/7
Why You’ll Love It
- Smart Sensing technology for enhanced accuracy
- Tracks sleep, activity, stress, heart health, and more
- Comfortable titanium design with discreet sensors
- 5–8 days of battery life per charge
- Water resistant up to 100m
- Compatible with iOS and Android
- Integrates with 40+ apps
- Available in six finishes
Available Finishes
- Silver
- Black
- Stealth
- Brushed Silver
- Gold
- Rose Gold
What’s Included
- Oura Ring 4
- Size-specific charger
- USB-C cable
- Free sizing kit available
Product Details
- Material: Non-allergenic titanium
- Width: 7.90mm
- Thickness: 2.88mm
- Weight: 3.3g–5.2g depending on ring size
- Battery Life: 5–8 days
- Charge Time: Typically 20–80 minutes
- Connectivity: Bluetooth Low Energy
- Water Resistance: Up to 100m / 328ft
Membership Note
Oura Membership renews automatically monthly or annually until cancelled. Membership gives access to personalised insights, trends, and AI-powered tools such as Oura Advisor.
Sleek, smart, and deeply personal—health tracking designed to grow with you.
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AYO is a team of innovators, visionaries, designers, engineers, programmers and entrepreneurs based throughout Europe who aspire to create meaningful innovative solutions that will be used by millions of people every day.