Sealed and Brand New Sleek and modern Oura Ring 4. Perfect for tracking health and wellness. Brand new and sealed in box. Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most your health.The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 30 biometrics including sleep, readiness, activity, heart health, stress and women’s health. Oura Ring quietly and comfortably monitors your health and with up to 8 days of battery life, you can forget it’s even on. ACCURACY WITH SMART SENSING - Oura Ring 4 is powered by Smart Sensing, which adapts to your unique finger and activity — delivering accurate, continuous data, day and night. • HOLISTIC HEALTH TRACKING — Oura provides over 30 biometrics, including sleep, activity, stress, heart health, and women’s health metrics. • DESIGNED FOR 24/7 WEAR—Oura Ring 4‘s updated design is more comfortable, fits better than ever, and is water resistant. The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin. • LONG LASTING BATTERY -up to 8 days* of battery life, Oura Ring 4 allows you to focus on the present. SYNC WITH YOUR FAVORITE APPS - Compatible with iOS and Android —Oura seamlessly integrates with over 40 apps including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava, & more.