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Product description 【Check the Size Before Purchase】 Before buying the Smart Ring, we strongly suggest that you refer to the size chart and carefully measure the circumference of your finger. This will ensure you get the most comfortable wearing experience and easily avoid any unnecessary returns or exchanges. 【Diverse Health Monitoring, All-round Protection】 The Smart Ring has a variety of powerful health monitoring modes. Whether it's running, walking, hiking, cycling, yoga, dancing, skipping rope or other sports, it can automatically and accurately track key data such as the exercise route, exercise time, steps taken, heart rate, speed, calories burned and exercise distance in the app. Moreover, it can continuously track important health data such as heart rate and blood oxygen throughout the 24 hours of the day, protecting your physical health in an all-round way. 【Intelligent Sleep Tracker, Caring for Your Health】 This fitness ring is like a considerate little assistant for your sleep health. It will accurately monitor the quality of your sleep, and record in detail the durations of deep sleep and light sleep, as well as the specific situations of your wakeful states. You just need to open the app at any time, and you can clearly view all kinds of sleep indicators. Then, according to the professional reports, you can easily adjust your lifestyle to embrace better-quality sleep. 【Long Battery Life and Ultra-thin Design, Enjoy the Convenience】 The Smart Ring has a very strong battery life. After a full charge, the battery can last up to 5 days, easily keeping up with your busy lifestyle. When used with the smart charging case, the usage time can even exceed 30 days. It is widely compatible with both Android and iOS systems, which is very convenient and practical. In addition, the updated design is lighter, thinner and more comfortable, with a greatly improved wearing fit. It's so light that you can hardly feel it on your finger. 【90-meter Waterproof, Suitable for Various Scenarios】 The Smart Ring has excellent waterproof performance, with a waterproof depth of up to 80 meters. Whether it's for daily wear, an intense workout session or a pleasant swimming time, it can handle it with ease. What's more, even if you have sensitive skin, you can still enjoy an extremely comfortable wearing experience when wearing this ring. 【No Subscription Fees, Enjoy Exclusive Services】 With the Smart Ring, you don't need to pay any subscription fees, and you can unlock the full range of functions of the Smart Health Monitoring App for life. Continuously enjoy the convenience of real-time health tracking, and also get professional and targeted advice, making health management easier and more efficient.