... -color illustrations5. With CDTalking pen for the sound books "The first series audio books for Baby " The reading pen is a popular Kid's ... the child. We have prepared a lot of sound books, for example , Mathematic , English learning, Classic Fairy Tales , Chinese learning , ... language.specification(P1,P3,P4,P6):1. OID Head, use sonix 4th generation OID head;2. Speaker, dual-channel, high-fidelity;3 ...