Type of Microphone: Unidirectional 32 Ohms is the input impedance. Headphone sensitivity: 100 dB +/- -3 dB Microphone sensitivity: -58dBV/μBar, -38dBV/Pa +/-4 dB Headset frequency response: 20 Hz to 20 kHz Microphone frequency response: 100 Hz–16 kHz 3.5mm audio in and out jacks (two pins) on an analog connection