Many schools have begun to use bracelets in class. Who can introduce the effect?

With the popularity of smart devices, bracelets have been widely used on campus for two years, and many primary and secondary schools are using them, which will definitely bring convenience to education management. Physical education class, for example, is used to monitor student movements. Like Qingdao Experimental Primary School, PE teachers always observe students' heart rate and exercise situation, adjust exercise intensity and ensure students' exercise safety. For example, some schools that try out the shift system use bracelets to realize students' punching, positioning, notification, course selection and other functions, providing technical support for the management of the shift system.