[The smart ring integrates step count distance measurement calorie count heart rate monitoring blood oxygen saturation detection stress monitoring sleep tracking and other health management functions. With indoor and outdoor running walking cycling and other sports modes. The smart ring is able to accurately measure and analyze sleep statistics sleep proportion sleep score average sleep heart rate and more. Innovative design brush short video selfie new height remote control photo so that you can easily capture beautiful moments anytime and anywhere. Provides up to 5-8 days of battery life. With a water resistance rating of 5ATM this series of rings can be adapted to various underwater activities without worrying about damage to the equipment. Before purchasing you must give your suitable size according to the measurement method we provide before purchasing.]