On/Off Button: On/Off button for play/pause function. Press the button to play, then press again to stop playback; motor operates in sync with music: motor rotates when music plays, stops when music pauses. Mode Button: Switch between 12 songs. Each button plays a specific song; music plays automatically when not pressing the button. Volume Button: These two buttons have the same function, offering high/medium/low volume levels. Each press toggles between the three levels. [Adjustable Volume] Baby music box has only 3 volume levels. Stroller motor features stepless volume adjustment, allowing you to set the most suitable volume from 0 to 100. Farewell to the fixed music box. [Soft Music] 12 lullabies that can be switched as desired. Each one is a unique sound for your baby's favorite lullaby and helps them fall asleep quickly. [User-friendly Design] Automatic shutdown after 30 minutes [Compatibility] Fits most stroller mats and stroller arms. Requires 2 AA batteries (not included). Color: White Material: ABS Size: 14 x 9 x 3.5 cm Package includes: 1 x music box Only the above package content included; other products not included. Note: Light reflection and different screens may cause the product color to appear slightly different from the actual item. The allowed measurement error is +/- 1-3 cm.