On/Off Switch: Play/Pause function button, press the button once to play music, then press the button once 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 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 Dial 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 choose from. [Adjustable 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 arms. 2 AA batteries 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.