oppo MP4S33

S33 is good, I am using it myself, and the sound quality is very good. Of course, it is best to match his own headphones. Video playback is also very clear and smooth. It has the functions of e-books and electronic dictionaries. E-books can't support Korean, which is my regret. Other than this, everything else is ok and can be seen. I think there are not enough words in the electronic dictionary. There are only three games, fishing, lianliankan and signing.