* Switch on/off button: Button for play/pause function, press the button once to play music, and then press the button once to stop playing; motor works synchronously with music: motor rotates when playing music, motor stops rotating when music is paused. * Mode button: Song switching function, 12 songs available, press the button once to switch to the next song; if you do not press the button, music will automatically play the next song. * Volume selection button: These two buttons have the same function, offering high / medium / low 3 grades of volume selection. Each press cycles through the three volume levels to select. [Arbitrary volume] Traditional baby music boxes offer only 3 volume options. This crib mobile motor offers stepless volume control, allowing you to choose the most suitable volume from 0 to 100. Farewell to traditional mobile music boxes. [Soft music] 12 lullabies, which can be switched freely. Play one song or loop them all. Choose your baby's favorite music to help them fall asleep quickly. [User-friendly design] Automatic shutdown after 30 minutes. [Compatibility] Fits most crib mobile hangers and crib mobile arms. Requires 2 AA batteries (not included). Color: White Material: Size: 14 x 9 x 3.5 cm CM Package Contents: 1 x Music box Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause slight color differences between the item in the picture and the real product. Measurement allows an error of +/- 1-3 cm.