Features:                
1. Digital headphone for sound chatting, telecommunication.


2. Plug and Play compatible with MSN, Skype directly. 

3. 30mm high magnetization Nd magnetism coil-moving loudhailer, makes the voice even clearer. 


4. 4 buttons on the control box, volume +/-  speaker mute, microphone mute.


5. Combined sound card function 



Specs:

Driver Unit:                                    Ö30mm


Microphone Operating Voltage:         4.5V

Speaker Impedance:                        32ohm±15%

Microphone impedance:                    2.2 K

Speaker Sensitivity:                         107dB±3dB

Microphone sensitivity:                     -58dB±2dB
Speaker Frequency Response:           20-20,000Hz


Microphone Frequency Response:      30-16,000Hz
Maximum Power Input:                    30mw
Cord Length:                                  1.9 meters