... sound effect CE,ROHS.ISO9001 Children's book with interesting soundschild color filling bookEach button control one ... 10,14,30,33 etc.7.Type of buttons: membrane 8.Batteries: 3A x 3pcs9.Customized sizes, sound ... Sound: music, animals, vehicles, people, and more, with high quality acoustic and long time durationOperation: turn on the ... the blind people learning Funny education book with sound pad for kids