R02 Smart Ring, Smart Ring for Women and Men, No Subscription Fee, with a Charging Case, Supports Heart Rate, Blood Oxygen, Sleep Health Monitoring, and Sports Tracking Ring. (Pink Ceramic, 9#)

No App Subscription Fee Required: Say goodbye to monthly bills! This smart ring requires no app subscription fee. Enjoy all features immediately, unlocking core data such as heart rate monitoring, sleep analysis, and 24/7 activity tracking, making health management straightforward. Purchase a Sizing Kit: Before buying the smart ring, we strongly advise that you purchase the sizing kit or measure your finger size according to the size chart to help you select the correct ring size for a comfortable fit. 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. Battery Performance: Your usage frequency determines your power consumption. - Basic Mode (4-5 days): Tracks only steps and basic sleep. - Balanced Mode (3-4 days): Synchronizes heart rate every 60 minutes. - Enhanced Mode (2-3 days): Monitors heart rate in real-time throughout the day. Frequent daily charging is required. Portable Charging Case: Comes with a compact charging case for charging anytime, anywhere. Nighttime Sleep Insights: Tracks continuous night rest for holistic wellness trends. Note: The algorithm is strictly calibrated for nighttime cycles to ensure data purity. Daily Health Tracking: Tracks long-term activity trends through natural arm swings. The algorithm filters out stationary hand movements to prevent data errors, supporting holistic health and lifestyle goals