Like New! Purchased in June 2024. I love Oura rings. This is my 2nd ring. Minor scratches (see video & pictures). Please reach out if you have questions. A small but powerful piece of technology. Oura translates what your body is telling you to paint a holistic picture of your health. Pinpoint Accuracy Your finger provides the most accurate reading of over 20 biometrics that impact your overall wellbeing. Measure resting heart rate with 99.6% reliability* Monitor heart rate variability with 98% reliability* Track temperature changes as small as 0.13 °C/ 0.234 °F** Durable Materials Every Oura Ring is made of titanium: built to last, lighter than the average wedding band, non-allergenic, and water resistant. Water resistant up to 100m/328 ft Non-allergenic Withstands a variety of temperatures, ranging from saunas to ice baths Research-grade Sensors Research-grade sensors accurately measure key health metrics like heart rate, temperature, and more — from day to night. Red LEDs measure blood oxygen levels while you sleep Green LEDs monitor heart rate 24/7 PPG sensors read resting heart rate, heart rate variability, and respiration NTC sensors monitor your nighttime skin temperature trends