* On/Off Button: Button for play/pause function. Press the button once to start, and press the button again to stop playing. The motor works synchronously with the music: the motor rotates when the music plays, and the motor stops rotating when the music pauses. *Mode Button: Song change function, a total of 12 songs. Press the button once to play the song; if you don't press the button, the music will automatically play to the next song. *Volume Dial Button: These two buttons have the same function, a total of 3 volume levels: high/medium/low. Press the button once to switch between the 3 volume levels: high/medium/low. [Arbitrary Volume] The traditional baby music box only has 3 volume levels. This crib mobile motor has stepless volume control, allowing you to choose the most suitable volume from 0 to 100. Say goodbye to the traditional mobile music box. [Soothing Music] 12 lullabies that can be switched at will. Select your baby's favorite music and help them fall asleep quickly. [User-Friendly Design] Automatic shutdown after 30 minutes [Compatibility] Fits most crib mobile hangers and crib mobile arms. Requires 2 AA batteries (not included). Color: White Material: ABS Size: 14 x 9 x 3.5 cm 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.