【Smart Anti-Loss Protection】Bluetooth positioning enables real-time tracking and intelligent loss prevention. 【Health Monitoring】 Monitor health metrics like heart rate and blood oxygen levels 24/7. The collected data can be visualized on a mobile app and shared if needed. 【Select the right size】Use a thin measure, inelastic string, wrap it around your finger, and mark with a pen. Once the thin is straightened, Use the ruler to measure the circumference then refer to the chart. For the smart ring fitness tracker, we recommend that women choose size #8 or #9, and men choose size #10 or #11. 【Easily connect】The health tracker fitness ring applicable to Android 6.0 or Above, IOS13 or above. Download the dedicated APP, turn on the Bluetooth connection of the mobile phone. The fitness ring is fully enclosed structure, IP68 waterproof technology 【Multiple health management functions】When you own a smart ring, you can have health monitoring, sleep analysis, exercise tracking, smart pedometer, menstrual cycle management and other functions at the same time. The collected data can be visualized in the mobile application and shared according to your needs. 【Long Battery Life】The Smart Ring has a battery life of up to 3-5 days on a 1.5 hrs charge, which long standby time of 7 days. Ideal for frequent business travelers and outdoor enthusiasts, ensuring continuous health monitoring no matter where you are. 【Multi-fonction】This smart health ring integrates multiple health management functions. 24/7 all-weather monitoring, paired with mobile devices, record visual health data. 【Menstrual Cycle Management】Accurate cycle recording helps women better manage their menstrual cycles. The smart ring is also a smart pedometer. Track daily exercise metrics, including steps and distance walked. The smart ring series designed for advanced health monitoring. It is slim and comfortable, integrating multiple health management functions, including heart rate monitoring, blood oxygen level tracking, sleep analysis, body temperature measurement and step counting. It monitors 24/7 without discomfort, and it pairs with a dedicated mobile app to visualize health data for easy interpretation. Ideal for fitness enthusiasts, people concerned about sleep quality and the elderly.