* On/off button: button for play/pause function, press the button once to play music and then press the button once to stop playback; the motor works synchronously with the music: the motor rotates when the music plays, the motor stops rotating when the music is paused.*Mode button: song change function, a selection of 12 songs, press the button once to play the song; if you do not press the button, the music will automatically play to the song.*Volume selection button: these two buttons have the same function, a selection of high / medium / low 3 volume levels, each time you press the button the volume will switch between the high / medium / low 3 levels to select.[Optional volume]The traditional baby music box only has 3 volume levels, the crib mobile motor has stepless volume, you can choose the most suitable volume from 0 to 100. Say goodbye to the traditional mobile music box.[Soft music]12 lullabies, which can be changed at will. Last, one. Choose your baby's favorite music and fall asleep quickly.[User-friendly design]Automatic shutdown after 30 minutes[Compatibility]Fits most crib mobile hangers, crib mobile arm2 AA batteries required, not included.Color: WhiteMaterial: ABSSize: 14 x 9 x 35CMPackage contents:1 x music boxOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.