Welcome to the store! * On/Off button: Button for play/pause function, press the button once to play music and press it again to stop playback; motor works in sync with music: motor rotates when music plays, motor stops when music pauses. * Mode button: Volume function, selection of 12 music tracks, press the button once to play the track; if you don't press the button, music plays automatically to the next track. * Volume control button: These two buttons have the same function, selection of high/medium/low 3 volume levels, each time you press the button, the volume switches between high/medium/low 3 levels to choose. [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 that can be changed according to preference. Finally, one. Choose your child's favorite music and fall asleep quickly. [User-friendly design]: Automatic shutdown after 30 minutes [Compatibility]: Suitable for most crib mobile hangers and crib mobile arms. 2 AA batteries required, not included. Color: White Material: ABS Size: 14 x 9 x 35 CM Packing content: 1 x music box Only the above packing content included; other products not included. Note: Lighting reflection and different screens may cause the color of the item in the picture to differ slightly from the actual product. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our highest priority. We will provide you with the best service. If you find any issues after receiving the product, such as damage or incorrect quantity etc., please contact us immediately so we can give you the best solution!