Steelseries 5H v2. Device connectivity: Wired, Device interface: 3.5 mm, Cable length: 3 m. Ear coupling: circumaural, Headphone frequency: 16 - 28000 Hz, Impedance: 40 Ом. Microphone frequency: 75 - 16000 Hz, Microphone sensitivity: -38 dB, Microphone input impedance: 2000 Ом. Volume control: Rotary