* Switch on/off button: Press once to play music, press again to pause. Motor operates in sync with music playback—rotates when music plays and stops when paused. * Mode button: Switch between 12 built-in songs. Each press advances to the next song. Music plays automatically when powered on. * Volume selection button: Two buttons with identical function. Cycle through high, medium, and low volume levels with each press. * Stepless volume control: Unlike traditional baby music boxes with limited volume settings, this crib mobile motor offers adjustable volume from 0 to 100 for optimal sound level. * Soft music: 12 soothing lullabies可 switched freely. Play one after another or select individual favorites to help baby fall asleep. * User-friendly design: Automatically shuts down after 30 minutes to conserve power. * 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 35 cm * Package Contents: 1 x Music Box (other items not included) * Note: Light reflection and display differences may cause slight color variation between image and actual item. Measurement tolerance: +/- 1-3 cm.