Everyone knows thatmodel approval is required in China. So, do you know which frequencies can be used? Does it mean that I can use which frequency to do SRRC? Below are related products regulated by the country, and the frequencies that can be used must not be used casually. Yes, different products use different frequencies, so as to ensure that they do not interfere with each other, to ensure the full use of the spectrum, and to ensure the quality of communication without interference.