Oura Ring 4 - Silver

BLACK FRIDAY SALE: 10% OFF UNTIL 1st DECEMBER. Tracks: • 24/7 heart rate monitoring (daytime and nighttime)  • Heart rate variability (HRV) — especially during sleep and recovery  • Respiration rate (breaths per minute) during sleep  • Blood oxygen (SpO₂) readings — red & infrared LEDs measure this while you sleep.  • Body temperature variation (skin/ finger temperature trends)  • Movement / activity tracking with accelerometer — steps, active calories, activity detection.  • Sleep staging & sleep quality metrics — including deep sleep, REM, latency, efficiency.  • Readiness score / recovery score — combining many of the metrics above to see how “ready” your body is for activity.  • For women: Cycle Insights / Women’s Health features (tracking menstrual cycle, etc) are included in the software.