The school headphones worn by college students should be answered by mobile phones. The school headphones worn by college students need to be connected to mobile phones or other audio devices to be used normally. School headphones are external audio output devices, which need to be connected to mobile phones through cables or Bluetooth to transmit audio signals. When using school headphones, college students need to connect the headphones to the audio output interface, such as the headphone jack of the mobile phone, Bluetooth connection or other audio interfaces, so that the headphones can receive the signal of the audio equipment of the mobile phone and play the audio to their ears in the form of sound.