specifications:Microphonedirectivity: Omni-Direktionalsensitivity: -58dB ± 4dBfrequency response: 80Hz ~ 16KHzoutput impedance: 2.2KOhm / DC 4,5VHeadPhoneoutput impedance: 32Ohm / 1KHzfrequency response: 20Hz ~ 20KHzsensitivity: 76dB ± 4dB