Oura - Ring 4 - Refurbished Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 8 - Silver - (2024)

Specifications

• Operating System Compatibility

  Apple iOS, Android
  Built-in Storage

  0 gigabytes
  Metrics Measured

  Activity vs. inactivity, Blood oxygen, Hours slept, Calories burned, Resting heart rate
  Protective Qualities

  Water resistant, Dust resistant
  Maximum Depth of Water Resistance

  328 feet