Power output:3~5W(RMS.1KHZ@THD10%)
  Drive Unit:2*2" speaker
  Frequency respond: 160HZ~20KHZ
  Input sensitivity: 200MV
  Power Supply: 2.5V~6V
  Impedance: 4 Ohm
  Plug & play device for MP3, MP4 & iPod players.
  Built-in amplifier for quality sound
  Includes audio cable
  Powered by AAA batteries.