It is assumed that the body contains a display screen, and the user can interact with the earphone by touching the screen. At the same time, the body is equipped with a two-dimensional code scanning device, which can pair with the two-dimensional code provided by the factory on the shell. After pairing, the operation mode of the earphone itself and the startup interface will change accordingly. At the same time, the user can also switch the initial operation mode and the custom switching mode in the settings. The body shell will be added with the product when the product is sold-the default factory color matching. At the same time, the customer can also choose to customize the shell appearance on the official website, but the custom shell does not have the internal setting effect.