1) Output: RMS 4W (2W+2W) stereo
2) Respond frequency: 150-18000Hz (±3dB)
3) Voltage: DC 9V/1,000MA
4) Recharge: 4 no. 7 batteries, DC 9V/1,000MA AC power rotate, USB power rotate connect line
5) Digital volume adjustment
6) Compatible with MP3 players, MP4 players, notebooks, computers, CD players, iPod NANOs, Sony Ericsson mobile phones with DIP music playing and power recharge
