What does the square dance use to play songs?

The "U disk player" used in our square is only 1 0,000 yuan. In the new time, it can be used for three consecutive nights (every night 1.5 hours), and it has been used for almost two years. Now it will be recharged after two nights of use. Under normal circumstances, there are about 20 people in our square, sometimes a little over 30. The effect is very good and the volume is very small. I estimate the volume to be 15* 15*5cm. But the song name is not displayed. If you think my answer is satisfactory, please help me choose this answer as [satisfactory answer]. thank you