There are no speakers on the back. Bernstein's early education machine is American infant English teaching, and it is a portable infant early education teacher, that is, looking up, Chinese and English enlightenment, teacher recording and infant situational teaching. Bernstein's early education machine has two speakers in front and no speakers in the back, so there is sound in front and no sound in the back. Bernstein (Shenzhen) Technology Co., Ltd. is a professional e-commerce company, which integrates the high-quality supply chain based on big data in the pregnant and baby industry, realizes all-stage and multi-directional product customization from "pregnancy" to "baby" and then to "child", and quickly develops the integrated marketing of major e-commerce channels in an assembly line way.