* On/Off Switch Button: Play/pause function button; press the button once to play music, and press the button again to stop playback; the motor works synchronously with the music: the motor rotates when the music is playing, and 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; 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 switched 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 arm. 2 AA batteries are required, not included. Color: White Material: ABS Size: 14 x 9 x 35CM 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 thing. The allowable measurement error is +/- 1-3 cm.