Welcome to the store! * On/Off Switch: button for play/pause function, press the button once to play music and then press the button once to stop playback; the motor works synchronously with the music: the motor rotates when the music is playing, the motor stops rotating when the music is paused. *Mode button: song change function, a selection of 12 songs, press the button once to play the song; do not press the button, the music is automatically played to the song. *Volume selection knob: these two buttons have the same function, a selection of high / medium / low 3 volume levels, each time you press the button the volume will switch between the high / medium / low 3 levels to select. [Optional Volume] The traditional baby music box has only 3 volume levels, the crib mobile motor has stepless volume, you can choose the most suitable volume from 0 to 100. Say goodbye to the traditional mobile music box. [Soft Music] 12 lullabies, which can be changed at will. Last, one. Choose your baby's favorite music and fall asleep quickly. [User-friendly design] Automatic shutdown after 30 minutes [Compatibility] Fits most crib mobile hangers, crib mobile arm 2 AA batteries required, not included. Color: White Material: ABS Size: 14 x 9 x 35CM Package contents: 1 x music box Only the above package content, other products are not included. Note: Light reflection and different screens may cause the color of the item in the picture to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!