Oura Ring 4 enhances your connection to your health with its updated all-titanium design. This smart ring features the new Smart Sensing platform, which not only measures over 30 biometrics like sleep, readiness, activity, heart health, stress, and metabolic health but also adapts to your body. It provides comprehensive insights for a better understanding of your well-being. Key Features: - Advanced Smart Sensing platform for in-depth biometric tracking - Titanium design that is comfortable for day and night wear - Up to 8-day battery life - Water-resistant up to 100 metres - Tracks daytime stress levels to help build resilience - Monitors heart rate for insights into cardiovascular health - Skin temperature tracking for illness detection and menstrual cycle insights Note: An Oura Membership (sold separately) unlocks advanced features like in-depth sleep analysis, personalized health insights, and live heart rate monitoring. Basic features include 3 daily scores (Sleep, Readiness, Activity) and access to Explore content.