G-Sound Headset Deluxe. Device connectivity: Wired, Cable length: 2.5 m. Acoustic system: clip-on, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 20 - 22000 Hz, Microphone sensitivity: -54 dB, Microphone input impedance: 2200 Ом. Connector(s): 3.5