O Ring Smart Ring, Fitness Trackers Rings with Sleep/Stress/Heart Rate/Women's Health Monitoring, No Subscription, Comfortable Wearing, Long Using,Fitness Ring for Android & iOS, Rose Gold-Size9

Get the Sizing Kit First: The smart ring's sizing differs from standard jewelry rings. You must use the official sizing kit before purchasing wear the tester ring to confirm comfort and accuracy. This step is critical to ensure reliable heart rate and HRV tracking. Innovative Stress Tracking: This fitness tracker ring tracks HRV in the background 24 hours a day, automatically quantifies stress levels, and helps you manage stress through personalized insights. Easily track your body's responses without disrupting your daily life. Comprehensive Sleep Management: It records and analyzes deep sleep, light sleep, REM, and wake duration in detail, providing core vital signs data such as sleep score, heart rate, blood oxygen, and HRV. This turns complex sleep information into understandable scientific advice to help you manage your sleep. One Ring, Multiple Functions: One fitness ring handles all your daily health management needs: step tracking, activity tracking, mood tracking, menstrual cycle prediction for women, basal body temperature monitoring, and more. Plus, continuous performance improvements and new feature additions provide a customized and evolving experience. No Subscription Fee: All practical and fun features are free with the companion app. It ensures that you can continuously experience real-time health tracking and personalized insights. Compatible with both iOS and Android. Comfortable and Waterproof: Weighing only 3 grams, made of durable titanium, and rated 5ATM waterproof, there is no need to remove it when washing hands or showering. It is specifically designed for all-day wear, offering comfort and durability, with a stylish look that complements your outfit