USB Speaker for Notebook

*2.0USBDigital Active speaker system;
*Built-Zoom mode, pure sweet sound;
*High-security magnetic speakers, aesthetic quality;
*Polishing process panel, aesthetic visual;
-------SPECIFICATIONS & FUNCTION------
Output Power: 3W X 2;
Input Power: USB Power or DC 5V;
RMS: 3W*2;
P. M. P. O.: 500W;
S/N<65dB;
Speaker: Left/right - 2-inch speaker;
Frequancy Response: 45Hz--18KHz;
Impedance: 4 ohms;