Headphone & microphone (EPM901)
Earphone:
Frequency
Response: 20Hz~20KHz
Impedance :32 ohm at 1KHz
Sensitivity :105dB ? 3dB
SPK dimension: ۵27mm
Microphone:
Sensitivity:-54dB ? 2dB
Mic dimension: 6 x 5MM
Directivity : Omni-direction
Cable length:... - Update: 2006-11-08