* Switch on/off button: Button for play/pause function. Press the button to start playing, and press again to stop. Motor works synchronously with music: motor rotates when music plays and stops when music is paused. * Mode button: Song switching function with a selection of 12 built-in melodies. Each press plays the next song. Music automatically starts from the beginning after the last song. * Volume button: Two buttons with identical function. Offers 3 volume levels: high, medium, and low. Each press cycles through the levels to select desired volume. * Arbitrary volume: The music box features 3 fixed volume levels. The crib mobile motor supports stepless volume control, allowing adjustment from 0 to 100 for optimal sound level. * Soft music: 12 lullabies that can be switched freely. After the last song, it loops back to the first. Play your baby's favorite melody to help them fall asleep quickly. * Baby-friendly design: Automatically shuts down 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 items not included. * Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.