APM Multimedia Headset. Interface type: 3.5mm, Cable length: 1.9 m. Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 98 dB, Impedance: 32 Ом. Microphone frequency: 100 - 10000 Hz, Microphone sensitivity: -54 dB, Microphone input impedance: 2200 Ом. Compatibility: Multi