The fitness bracelet has many functions. It can record your exercise data, such as steps, heart rate, calories burned, exercise time and so on. And provide targeted fitness programs after analysis. Smart bracelets can also monitor physical health and provide many tips in daily life. For example, the smart bracelet can record the user's sleep data and analyze the user's sleep quality to guide users to improve their sleep. In addition, the smart bracelet can also monitor some important indicators, such as blood oxygen concentration, blood pressure and other data, and find physical discomfort and diseases in time. Smart bracelets can also improve mental health by monitoring users' psychological conditions, such as changes in mood and stress.