The main function: 1.Exercise : Monitor and record exercise data in real time, provide weekly or monthly exercise trends, and make exercise clear at a glance; 2. Sleep: It can monitor sleep data, record the time of deep sleep and light sleep, and help users understand their sleep situation in real time; 3 Precautions: After setting the bracelet, you can make reminder reminders, clear goals, convenient for users to sit reminders, steps and other personalized settings to provide more living habits. 4. The core functions of the application are: SMS content and incoming call information, which are used to forward to the bracelet for display.