Transcend 8GB T.Sonic 320 MP3 Player with Built-in USB Flash Drive General Features: Radio Tuner; Built-In Microphone; On-The-Go Playlists; Radio Recording Audio Features: Preset Eqs; Custom EQ; Speed Control SUPPORTED FILE FORMATS Edit Audio Formats: MP3 / WAV / WMA Battery Type: Built-In (Li Polymer) Charging Connection: USB