Oura Ring 4 Size 7

Oura Ring is preowned and in excellent condition comes with instructions brouchore and charger. Please view images for more on rings condition.

• Quality Materials

  • Non-allergenic titanium on inner and outer ring surfaces
  • Seamless titanium interior
  • Minor scratches from regular wear are normal over time
  • Water resistant up to 100m/328 ft

• Sensors

  • Red and infrared LEDs measure blood oxygen levels while you sleep
  • Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate during your sleep
  • Digital sensor measures your temperature variations
  • Accelerometer tracks movement and activity 24/7

• Battery Life

  • Up to 8 days of battery^*
  • Typically charges in 20-80 minutes, depending on battery level

• Weight and Dimensions

  • Width: 7.90mm
  • Thickness: 2.88mm (similar to a wedding band)
  • Weight: 3.3 to 5.2 grams (depending on ring size)

• Compatibility

  • Oura App is available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, and Danish
  • Supports metric and imperial units of measurement
  • Integrates with 40+ apps
  • Available on iOS and Android

• Connectivity

  • Bluetooth® Low Energy
  • Automatic firmware updates via Oura App
  • EMF-safe
  • Allows airplane mode
  • FCC-certified