Oura Ring 4 - Ceramic Midnight - Size 13

SEALED Oura Ring 4 - Ceramic Midnight - Size 13 - Smart Ring, Sleep, Activity, Women’s Health, AI Advisor, Up to 8 Days of Battery Life, Size Before You Buy, Android & iOS Compatible Product details Top highlights Operating system Proprietary OS Special feature Activity Tracker, Cycle Tracking, Lightweight Connectivity technology Bluetooth Wireless communication standard Bluetooth Battery cell composition Lithium Polymer GPS GPS Via Smartphone ACCURACY - SMART SENSING - Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, metabolic health,and women’s health metrics. Smart Sensing technology adapts to you — delivering accurate, continuous data, day and night ACCURATE SIZING ESSENTIAL - Oura Ring 4 uses unique sizing different from standard jewelry rings; use the Oura Ring 4 Sizing Kit to find your perfect fit before purchasing LONG LASTING BATTERY - With 5 to 8 days of battery life, no screens and no vibrations, Oura Ring 4 Ceramic allows you to focus on the present. From a workout to a night out — you’re free to forget it’s on. Until you start getting compliments OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 7.99/mo afterwards. Membership is tied to your account via the Oura App, not your physical ring DESIGNED FOR 24/7 WEAR - The updated design of the Oura Ring 4 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