... MP3 song 3.Lithium battery. 2/4GBmemory 4.language learning+quality touch reading pen for children study Intro: 1 ... . Touch the pen to the words or symbols on the pages of specially printed books, words talk, ... like a MP3 player. Many functions can be used on the pen, such as repeat, record, translate, speed ... . The camera lens can identify the hidden codes on the book pages, which make it possible that ...