* switch on/off button: button for play/pause function, press the button once to , 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, a total of 12 music, each button once to play the song; do not press the button music automatically play to the song. *Volume selection button: these two buttons have the same function, a total of high / medium / low 3 grades of volume selection, each press the button once the volume will be cycled between the high / medium / low 3 grades to select. [Arbitrary volume]The traditional baby music box has 3 levels volume only.crib mobile motor adopts stepless volume, you can choose the most appropriate volume from 0 to 100. Farewell to the traditional mobile music box. [Soft music]12 lullabys, which can be switched at will. Last one, one. Choose your baby's favorite music and go to sleep quickly. [User friendly design]Automatic shutdown after 30 minutes [Compatibility]Fit most crib mobile hanger,crib mobile arm.2 AA batteries are required, not included. Colour:White Material:ABS Size:14 x 9 x 3.5CM Package Contents: 1 x musicbox Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!