Several common health care instruments in the market are used in the same way, because most health care instruments are developed for the elderly. So it is convenient to use them and various function buttons. Many buttons have related text marks, which can help you master the usage quickly. Most health care instruments can play a certain role as long as they press the relevant buttons, and can also be used according to some different buttons or knobs. Each kind of health care instrument will have supporting instructions and related video instructions. So after the introduction, you can study it yourself or watch the demonstration film first to understand the use of different health care instruments.