Experience precision wellness tracking with the Oura Ring 4 Smart Ring Health Activity Tracker – Stealth (Ring Size 14) | JZ90-54218-14. Expertly engineered from premium titanium, this lightweight and durable smart ring is designed for 24/7 wear, offering superior comfort and water resistance. With Smart Sensing technology, the Oura Ring 4 continuously adapts to your body to deliver accurate readings across 30+ biometrics, including sleep, heart rate, activity, stress, and women’s health metrics. The long-lasting battery provides up to 8 days of power on a single charge, while the screen-free design ensures focus and mindfulness throughout the day. Compatible with iOS and Android, it integrates seamlessly with Apple Health, Google Health Connect, and the Oura Membership app. Stylish in its Stealth matte finish, the Oura Ring 4 combines advanced technology, minimalist elegance, and superior performance for a complete health-tracking experience.