If you 'Follow', you could get some more. https://www.instagram.com/toughcookie.co.kr : : Product Function - Playback Speed Control (Play Speed Change, Music Speed Change) - Repeat and Loop Play, Shuffle Play (Random Play) - Pitch Alteration (Transposition by Semitone) - Seek (Skip and Jump to Position and Playback Navigation) - Bass Boost (Bass Booster on / off) - Audio File Folder Browser (Audio File Scanner) - Favorite Playlist (to keep Tag File List) - Audio File Search (like mp3 file) : : Use and Application - Music Listening and Learning (Guitar Copy etc.) - Study of Language (Audio Script Listening, Study of Foreign Language) ======== English(Google Translate) ======== : : function - Playback speed control (speed playback, music speed control) - AB repeat playback and loop playback, random playback, - Ability to change the pitch (transpose function) - File search (interval jumps) - Bass Boost (bass emphasis) - Manage Files folder - Tag file management (create playlists, favorites specify) - Audio files search : Use and purpose - Music study and music (music play copies and other copy, etc. for music lovers and musicians) - Language study (for audio scripts, students and the general public, such as foreign language learning, foreign language learning)