Smart Ring for Women, Health Tracker & 5ATM, R02.(Black Ceramic, 10#) Smart Ring & No Subscription Fee, Menstrual Cycle, Skin Temperature, Heart Rate, Sleep Health Monitoring, Sports Tracking

[No App Subscription Fee Required] Say goodbye to monthly bills! The smart ring requires no app subscription fee. Enjoy all features right out of the box, instantly unlocking core data such as heart rate monitoring, sleep analysis, and 24/7 activity tracking, making health management pure and simple. [Purchase a Sizing Kit] Before purchasing the R02 smart ring, we strongly recommend that you purchase the sizing kit or measure your finger size according to the size chart to help you choose the correct ring size for a comfortable fit and to avoid unnecessary returns or exchanges.

[Nighttime Sleep Insights] Tracks continuous night rest for holistic wellness trends.
Note: Algorithm is strictly calibrated for nighttime cycles to ensure data purity. [Heart Rate Measurement] 24/7 smart heart rate measurement allows you to understand your heart rate status and monitor heart rate abnormalities, keeping track of your daily health. [Skin temperature] Supports skin temperature measurement, and allows you to set a timer for measurement to monitor your skin temperature at all times. [Portable Charging Case] Includes a compact charging case for charging anytime, anywhere, without worrying about running out of power. [Ring Protector] The ring comes with a white silicone ring protector. When wearing the ring, you can put the ring protector on the ring to prevent friction and scratches