Oura Ring 4 (Gen 4) Black Size 6 Health Sleep Activity Tracker + Charger What is included: • (1) Oura Ring 4 (Gen 4) - Black, Size 6 • (1) Original Oura Charging Base (USB-C cable is integrated) Key Features of the Generation 4 Model: The Gen 4 model features a sleeker, fully-titanium design with recessed sensors, making it significantly more comfortable than previous generations. It is one of the most accurate health trackers available, monitoring: • Sleep: Detailed analysis of Sleep Stages (REM, Deep, Light), Total Sleep Time, and Restfulness. • Readiness Score: Provides an overall picture of your recovery based on metrics like Resting Heart Rate (RHR), Heart Rate Variability (HRV), and Body Temperature. • Activity: Tracks steps, calories, and provides automatic workout detection. • Heart Health: Measures 24/7 Heart Rate and Blood Oxygen Levels (\text{SpO}_2) during sleep. • Durability: Water-resistant up to 100 meters (safe for swimming and showering). Important Buyer Note (Oura Membership): Please be aware that the Oura Membership ($5.99/month) is tied to a user's account and is not transferable with the ring. The new owner will need to create their own Oura account and enroll in a new membership plan to access all the advanced features and data after the transfer. The ring has been factory reset and is ready to be paired with a new account.