[Heart Rate Ring] The smart bracelet supports 24-hour continuous heart rate tracking. Whether in daily life or during exercise, the health ring can monitor your heart rate at any time, allowing you to better understand your physical condition and make corresponding adjustments. [Smart Sleep Ring]Features a built-in automatic sleep tracker that monitors sleep time at night and provides comprehensive sleep quality analysis (deep sleep time, light sleep time, wake-up time), helping to develop good sleep habits. All-day fitness tracker: Automatically tracks steps, calorie consumption, and distance. Activate the exercise mode in the app, and the fitness ring will additionally track your movement path, activity time, and heart rate during workouts. This allows you to know when to conserve energy or maintain exercise intensity, while also providing you with real-time exercise performance data. IP68 Waterproof Ring: IP68 waterproof technology supports swimming, hand washing, cold showers, and rain, providing convenience in your daily life. Note: Please stay away from hot water or steam. Retro comfort: Our smart ring features a unique and stylish design, allowing you to stay connected without compromising on style. It is made of lightweight material, weighing only 3 grams, allowing you to truly experience negligible wear and tear. Compatibility and after- service: The application does not charge any subscription fees and is compatible with smartphones running Android 5.1 or iOS 8.0 and above. Please choose the correct size; if it is too loose, it will affect the accuracy of the data.13#,12#,11#,10#,9#,8#