Track over 50 health metrics from a single finger with the OURA® Ring 4 Ceramic Smart Ring, a sleek wearable powered by Smart Sensing™ technology that continuously adapts to deliver accurate sleep, activity, stress, heart health, and recovery data day and night. The scratch-resistant ceramic ring design weighs just 3-4 grams and lasts up to 8 days on a single charge, providing an AI-powered Oura Advisor™ that delivers personalized daily insights without the bulk of a wristband.