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Product Features: You can choose only the functions you need for your own display; New surface temperature and stress level measurement functions; Measures activity levels (steps taken, calories burned, walking distance, exercise time, and stand time). Sleep monitor function allows you to manage your sleep. Measure your heart rate. Measure blood oxygen concentration *This product is not a medical device. Measurement values are for reference only; Measurement of specific sports items (running, cycling, jumping rope, etc.); Stopwatch, timer, and calculator function; Displays historical data in graph on the app; Connects to a wide variety of smartphones, such as incoming calls, message notifications, etc.