1. First, when different buttons are pressed, the buzzer plays M different songs (M is greater than or equal to 4, and the time of each song is greater than or equal to 1 minute), and the serial number/name of the song is displayed on the LCD. /Singer and other information.

2. Secondly, there is a button to control the start and stop of the song.

3. Finally, there are two buttons to adjust the speed of song playback.