*Simple MP3 Player * MP3, WMA,WAV * E-book function * Repeat function * Voice Recorder Simple MP3 Player ER-M39* Support MP3, WMA,WAV format music player* High speed USB 2.0 (FS) interface* E-book function* Repeat function A-B section freely* Voice Recorder function* Rechargeable li-battery build in Classic MP3 USB player, FM MP3,MP3 player