YOUR SMART FITNESS PARTNERThis health tracker ring is an easy to use activity fitness tracker built in multiple functions, can monitor your heart rate, temperature, blood oxygen, steps, calories and other data at any time, so that you can observe your health at any time, which helps you find your energy, do what you love and feel your best. All you have to do is wear it. TRACK ALL DAY ACTIVITYThis smart ring health tracker can be a sports ring, because it can record your steps in a day, providing you great using experience. In addition, it will understand heart rate trends and better estimate calorie burn with heart rate monitoring, tune in to your body with health metrics like breathing rate, heart rate variability, etc., help improve your movement health. SLEEP TRACKERThis calories burned fitness tracker can also detect your sleep time and sleep state during your sleep to tell you how your sleep quality is, which will help you better understand your sleep quality each night and help you adjust your sleep habits. The wearing experience is so light that you may forget its existence. It has no sense of wearing, perfect for wearing while sleeping. LONG BATTERY LIFEThis sleep tracker device built in 18mAh battery which takes only 45 minutes to charge and you can enjoy up to 5 days of long battery life. Say goodbye to daily recharge, very suitable for travel, business trip, camping, etc. It is a meaningful any scene or holiday, such as birthday, anniversary, Thanksgiving, Christmas, Hanukkah or Valentine's Day, etc.