* On/Off Switch: button for play/pause function; press the button to play and then press the button to stop playback; the motor works synchronously with the music: the motor rotates when the music is playing, the motor stops rotating when the music is paused. *Mode Button: song change function, a set of 12 songs, each press of the button plays a song; do not press the button, the music automatically plays to the next song. *Volume Button: these two buttons have the same function, a set of high / medium / low 3 volume levels, each press of the button will switch the volume between the high / medium / low 3 levels to select. [Arbitrary Volume] The 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 fixed volume of the music box. [Soft Music] 12 lullabies, which can be changed at will. Play 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 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 picture to be slightly different from the real color. The allowed measurement error is +/- 1-3 cm.