1) This compact travel speaker system is ideal for use at the office, home or anywhere you go 2) You can enjoy high quality stereo sound produced form the plastic speakers 3) Cosmetically designed to match the iPod, it will also work with any portable CD, MP3 players when used with an iPod, it will also act as a stand 4) It can be powered either through AC adaptor or batteries 5) The unique fold-up design protects the 6) Speakers and makes it easy to carry around Specifications: 1) Power by: DC 6.0V (AAA x 4 batteries) or AC 2) Adaptor: output 6V, 350mA 3) Drive units: 50mm x 2 4) Output power: 2. 5W 5) Frequency: 100Hz - 12kHz 6) Impedance: 4 ohms 7) Sensitivity: 89dB 8) THD: <0.1% 9) Material: ABS plastic