OURA RING 4 CERAMIC SIZE 7 is a premium smart ring designed to help you understand your health, sleep, activity, and overall wellness in a stylish and comfortable design. Made with durable, high quality ceramic materials, it combines elegant everyday wear with advanced health tracking technology. It monitors heart rate, heart rate variability, blood oxygen levels during sleep, body temperature trends, sleep quality, daily activity, stress levels, and recovery insights. The Oura Ring 4 helps you understand your readiness for the day, track your fitness progress, monitor sleep patterns, and build healthier daily habits. Its lightweight, discreet design makes it suitable for everyday use, whether you are working, exercising, travelling, or sleeping. It connects to a compatible smartphone through the Oura app