· Music file formats:MP3/WAV/WMA I
· nterface:USB2.0 protocol (FS)
· Battery life:Successive 5 to 6 hours if battery is fully charged
· Battery voltage:3.7V
· Power output:55mw
· Earphone output:5mw
· Frequency response:20Hz - 20KHz
· Recharging time:3 hours
· Normal operating voltage:30 - 35mA
· Memory:128MB - 1GB
· Signal-to-noise ratio:86dB
· Size:ф43mm * 12mm
· Earphone impedance:16 Ω*2