* Switch on/off button: button for play/pause function, press the button to play, and then press the button to stop playing; motor works synchronously with music: motor rotates when playing music, motor stops rotating when music is paused. * Mode button: song switching function, a total of 12 music options, each press to play a song; do not press the button, music will automatically play to the next song. * Volume button: these two buttons have the same function, a total of high / medium / low 3 grades of volume, each press the button the volume will be cycled between the high / medium / low 3 grades to select. [Arbitrary volume] The baby music box has 3 levels of volume only. Crib mobile motor adopts stepless volume, you can choose the most appropriate volume from 0 to 100. Farewell to the traditional mobile music box. [Soft music] 12 lullabies, which can be switched at will. Last one, one by one. Play your baby's favorite music and go to sleep quickly. [User-friendly] Automatic shutdown after 30 minutes. [Compatibility] Fits most crib mobile hangers, crib mobile arms. 2 AA batteries are required, not included. Color: White Material: ABS Size: 14 x 9 x 3.5cm Package Contents: 1 x Music box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the photo to be a little different from the real thing. The measurement allowed error is +/- 1-3cm.