... pre-recorded and re-recorded. The16 keys bilingual electronic learning machine for children book ·· Activated: by press button. Function: To understand ... ,voice chip,speaker,LED indicator and batteries, more or less for different item.· Plastic shell : the lenth is 200mm, the ... is 15mm,customized idea welcome ! Sound:could be any animal sounds,traffic sound effects,music,voice or any sound effects ...