You can't. All-in-one machine with microphone used by school teachers has high sensitivity. When the all-in-one machine with microphone and butterfly speaker are together, it is easy to have problems such as howling and noise, which affects the sound quality. The two cannot be used together. In order to avoid the noise and interference caused by the mismatch between microphone and speaker, it is necessary to choose the appropriate microphone type and placement position to obtain the best sound effect.