DetailsDescriptionIntroducing 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 50 health metrics 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.Sleeker, smarter, and more accurate than ever, Oura Ring 4 is made for you.Oura Ring sizes are different from standard ring sizes. It’s important to find your size before you purchase Oura Ring 4. Find your size by purchasing an Oura Ring 4 Sizing Kit on Target.com. Purchase ‘Oura Ring 4 Sizing Kit’ on Target.comLearn your size by wearing your sizing kit ring for at least 24 hours Purchase Oura Ring 4 on Target.comStart your health journey with OuraTop FeaturesSLEEP - Get the best sleep of your life, and then some. Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Oura provides insights into your sleep staging throughout the night, blood oxygen levels, HRV, and nighttime heart rate.ACTIVITY - Whether you're running a marathon or running errands, Oura tracks your daily activity, steps, calories burned, and workouts while helping you strike a balance between movement and recovery.READINESS - Know when to push it and when to take it easy with the Oura Readiness Score. It takes into consideration over 50 different health metrics — including temperature, heart rate, HRV, and sleep — to tell you how ready you are for the day ahead.STRESS - Oura will help you identify signs of stress and understand how well your body handles it. You'll know when you need to incorporate more self-care practices and how to recover from longer-term stressors.WOMEN’S HEALTH - Your cycle impacts your moo