The SD card USB disk interface is loose.

Because the interface is loose, it will cause poor contact of the SD card (U disk), thus affecting the normal playback of music. Therefore, if you find that the music in the player is not smooth, the music stops and makes noise, we first check whether the interface is loose. If there is any looseness, repair it in time.

A speaker refers to a device that converts audio signals into sound. In layman's terms, it means that the speaker host box or subwoofer box has its own power amplifier, which amplifies the audio signal and then plays back the sound from the speaker itself.