Oura Ring 4 Rose Gold - Smart Health Ring (Size 7)
The Oura Ring 4 is a smart ring made entirely of titanium that tracks over 50 health metrics: sleep, activity, heart rate, stress, heart health, and women's health. Its new Smart Sensing platform offers increased accuracy, deeper personalization, and extended battery life. Rose Gold finish with PVD coating on titanium.
- Size: 7
- Material: Hypoallergenic titanium, seamless inner surface
- Width: 7.9 mm / Thickness: 2.88 mm
- Weight: 3.3 to 5.2 g depending on size
- Battery life: 5 to 8 days, charges in 20-80 minutes
- Sensors: Red/infrared LED (SpO2), Green/infrared LED (HR and HRV), temperature sensor, accelerometer
- Water resistance up to 100 m
- Bluetooth Low Energy, compatible with iOS and Android
Condition: Used product in good condition, fully functional. Minor signs of wear possible.
