* Switch on/off button: Press the button to play, and press again to pause. Motor operates in sync with music, rotating when music plays and stopping when paused. * Mode button: Allows switching between 12 built-in songs. Each press advances to the next song. Music plays automatically when powered on. * Volume button: Two identical buttons control volume with three fixed levels: high, medium, and low. Each press cycles through the levels. The baby music box offers 3 volume settings. The crib mobile motor allows seamless volume adjustment from 0 to 100 for personalized sound control. * Soft music: Features 12 lullabies that can be switched freely. Plays one song at a time. Helps your baby relax and fall asleep quickly. * User-friendly: Automatically shuts down after 30 minutes. * Compatibility: Fits most crib mobile hangers and 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 (other items not included) * Note: Light reflection and display differences may cause slight color variation. Measurement error allowed within +/- 1-3 cm.