1. Excellent audio quality.
2. Adjustable earpiece.
3. Noise suppression microphone.
4. Single side earphone designed.
5. Support skype, msn, yahoo.
1. Headphone: (1) Drive Unit: O 10mm w/ferrite magnet. (2) Impedance: 80hms. (3) Frequency response: 50~16000 Hz. (4) Sensitivity: 96dB ± 3dB at 1.0cm 0.3V. (5) Maximum input power: 30mw. (6) Cord length (CM): 180 ± 3%. 2. Microphone: (1) Size: O 6 x 5mm. (2) Frequency response: 20~16000Hz. (3) Sensitivity: -54dB ± 3dB.