It is specially designed to play video and audio files in Android device for language learning. The audio and video playback functions include play, pause, fast forward, fast rewind and record, the fast forward and rewind step can be adjusted easily at any time. The playback speed can be adjusted easily at any time, it is easy to set A play point and B play point and Repeatedly play audio and video between points A and B, points A and B can be fine tuned back and forth. During the playback of audio and video, you can record and play audio at any time, record a specific playback position of a section in the audio and video to a file for later playback of this section, and view the content of TXT or PDF files while playing audio and video.