Oura Ring 4

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