Logitech H360. Device connectivity: Wired, Cable length: 2.4 m. Headphone frequency: 40 - 18000 Hz, Impedance: 32 Ом, Headphone sensitivity: 94 dB. Microphone frequency: 100 - 10000 Hz, Microphone sensitivity: -44 dB. Minimum system requirements: USB, Compatible operating systems: Windows XP, Vista, 7 Mac 10.3.9+ Linux kemel 2.4+