* Switch on/off button: Press once to play, press again to pause. Motor rotates when music plays and stops when music is paused. * Mode button: Switch between 12 built-in songs. Press the button to change to the next song; songs play automatically if no input is given. * Volume selection button: Two buttons with identical function. Cycle through three volume levelshigh, medium, lowwith each press. * Stepless volume control: Offers adjustable volume from 0 to 100, allowing personalized sound levels for your baby's comfort. * Soothing music: 12 lullabies, easily switch between tracks to find your baby's favorite. * Auto shut-off: Automatically turns off after 30 minutes to conserve battery and support uninterrupted sleep. * 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 * Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement error allowed within +/- 1-3 cm.