Feature:<br> Light music can help your baby fall asleep more easily. Music can even help enhance the music of premature babies. Music plays a vital role in connecting the baby's brain for learning. Listening to music can help you teach your baby about patterns and sequences, and about rhythms and beats. Information about intonation and intonation is used for problem solving and reasoning. Early musical exposure can help improve key listening skills, language and literacy skills, creativity and coordination skills<br><br> Specification:<br> Music box: 4.72 x 2.63 x 0.98 inches<br> Playing speed: 12-20 inches<br> Full game time: 2-3'<br> Service life: ¨R500 times<br> The thickness of the clip-on crib rail can reach 1.57 inches, and the clip-on crib rail can reach 2.75 inches in height<br> Material: ABS<br> The total height of the crib mobile bed bell frame: 26 inches<br><br> How to use it:<br> Easy to use: Rotate the highlight button, then let go of the button, the music box will play music, there is a pause button on the music box, you can press this button to pause the music when you want to pause the music<br><br> what's include: <br> 1Xcross shelf <br> 1x curved rod <br> 1x straight rod <br> 1x base<br><br> Note: Before Purchasing, please make sure the edge of your crib suitables for the baby bed holder(the distance between screw and holder can reach up to 1.57inch) <br><br> The diameter of aim hook hanging is 0.25inch(0.7cm), please make sure your mobile unite fit the product