Power button: play/pause function button, press the button once to , and then press the button once to stop playing; the motor works synchronously with music: the motor rotates when playing music, the motor stops rotating when the music is paused. *Mode button: song switching function, a total of 12 music, each button once to play song; do not press the button, the music will automatically play to song. *Volume selection button: these two buttons have the same function, a total of high / medium / low 3 degrees of volume selection, each press of the button when the volume switches between high / medium / low 3 degrees to choose. [Arbitrary volume] The traditional baby only has 3 volume levels. The crib mobile motor adopts stepless volume, you can choose the most suitable volume from 0 to 100. Goodbye to the traditional mobile music box. [Soft music] 12 lullabies, which can be switched at will. The last one, the next one. Choose your child's favorite music and fall asleep quickly. [User-friendly design] Automatic shutdown after 30 minutes [Compatibility] Fits most cribs, mobile cribs. 2 AA batteries required, not included. Color: White Material: ABS Size: 14 x 9 x 3.5 cm Package Contents: 1 x Music Box Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm. We strive to provide you with excellent after-sales service. No matter what problems you encounter, our professional team will do their best to solve them for you and ensure that you have a pleasant shopping experience.