... the pen. Point to learn, Point to Speech. 8. High-Fidelity speaker, real pronunciation. 9. Effective working time after fully-charged ... , use sonix 4th generation OID head;* Speaker, dual-channel, high-fidelity;* Built-in 4G Bytes Nand-Flash Memory;* TF-Card, Can ... Earphone, 3.5 mm standard earphone slot;* Battery, 300 mah high capacity lithium battery* Recording function: children can record and easy ...