FZ-5588 1GB USB MP3 Player Headset FZ-5588 1 GB USB MP3 Player Headset General Features: Behind-the-head headset style 1 GB capacity USB interface Plays MP3 files Five (5) Preset EQ Lithium battery charged directly by PC via USB connector Battery playtime between 7 to 8 hours after fully charged MP3 Data Flow Rate: 32 Kbps - 384 Kbps Output Frequency Range: 20 Hz to 20 KHz