Smart Ring for Women, Health Tracker & 5ATM, R02.(Black Ceramic, 7#) Smart Ring & No Subscription Fee, Menstrual Cycle, Skin Temperature, Heart Rate, Sleep Health Monitoring, Sports Tracking

[No App Subscription Fee Required] No app subscription fee is needed. Access core data such as heart rate monitoring, sleep analysis, and 24/7 activity tracking. [Purchase a Sizing Kit] Before purchasing the R02 smart ring, use the sizing kit or measure your finger size according to the size chart to choose the correct ring size for a comfortable fit and to avoid unnecessary returns or exchanges. [Nighttime Sleep Insights] Tracks continuous nighttime rest for wellness trends and continuous night rest for holistic wellness trends. The algorithm is calibrated for nighttime cycles. [Heart Rate Measurement] 24/7 smart heart rate measurement helps monitor heart rate status and abnormalities.

[Skin Temperature] Supports skin temperature measurement with an adjustable measurement timer. [Portable Charging Case] Includes a compact charging case for charging anytime, anywhere. [Ring Protector] Includes a white silicone ring protector to help prevent friction and scratches while wearing the ring