I bought an audio wall chart for my baby in Tmall before. The one I bought is very good. It has music, Chinese, English and recitation, and its voice can be adjusted. The color is beautiful, and the wall chart has concave-convex texture. The most important thing is to have 3C certification. Buy three tools to send batteries, hooks and small screwdrivers. There are one-sided and two-sided ones. According to different styles, the price ranges from 7.9 to 12. You can't send a link here. Please trust me personally if you need it.