Oura Ring 4 | Size 8 | Rose Gold

Oura Ring 4 Size 8 Size Specific Charger USB C Cable Manual Original Box Tech Specifications • 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 • 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 (similar to a wedding band) • 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 Reason for selling : I want to get the ceramic ring.