A4 Tech HS-100
- Frequency Response: 20Hz-20kHz. - Nominal Impedance: 32ohm - Sensitivity: 111dB±3 dB. - Speaker Diameter:F50mm - Cable Length: 2 m - Microphone Sensitivity: -58 db±3db - Earphone Hook Included - Volume Control In-Line - Microphone In-Line www.a4tech.com