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Order the Sizing Kit Before Purchase The sizing of this smart ring is different from standard jewelry rings. You need to use the official sizing kit prior to buying wear the tester ring to verify comfort and fit. Advanced Stress Monitoring This fitness tracker ring monitors HRV continuously throughout the day, automatically measures stress levels, and assists you in managing stress with tailored insights. Effortlessly track your body's reactions without interrupting your daily routine. Detailed Sleep Analysis The ring meticulously records and analyzes deep sleep, light sleep, REM, and wake periods, delivering key vital signs data including sleep score, heart rate, blood oxygen, and HRV. It transforms intricate sleep data into clear, scientific guidance to help you improve your sleep. Versatile Health Management A single fitness ring addresses all your daily health tracking requirements: step counting, activity monitoring, mood logging, menstrual cycle prediction for women, basal body temperature tracking, and more. Additionally, ongoing performance enhancements and new feature updates deliver a personalized and evolving experience. No Subscription Required All useful and enjoyable features are included free with the companion app. The ring allows you to consistently access real-time health tracking and personalized insights. It works with both iOS and Android. Comfortable and Water-Resistant Weighing just 3 grams and crafted from durable titanium, it is rated 5ATM water-resistant. You don't need to take it off when washing hands or showering. It is engineered for all-day wear, providing comfort and longevity, with a fashionable design that matches your style