* Switch on/off button: Press once to play music, press again to pause. Motor rotates when music plays and stops when paused. * Mode button: Switch between 12 built-in songs. Each press advances to the next song. Music automatically starts from the beginning if not manually switched. * Volume selection button: Two buttons with identical function. Cycle through high, medium, and low volume levels with each press. * Arbitrary volume control: Features stepless volume adjustment from 0 to 100, allowing precise volume setting. * Soft music: 12 lullabies can be freely selected. Play one after another or choose a favorite to help baby fall asleep. * User-friendly design: Automatically shuts down after 30 minutes of operation. * Compatibility: Fits most crib mobile hangers and arms. Requires 2 AA batteries (not included). * Color: White * Material: ABS * Size: 14 x 9 x 35 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.