The SteelSeries 5H v2 USB Headphone comes with a 7.1 virtual surround soundcard for a consistent sound experience allowing gamers to hear the exact same sound and settings, no matter where they are or what computer they are playing. The SteelSeries 5H v2 has enormous full-size ear cushions to fit gently around your ears and reduce background noise. The custom-engineered soundscape enhances performance and immersion in FPS games. Listen to in-game sounds with optimized sound frequencies for footsteps, alerts and gunfire. Hear and pinpoint the locations of your opponents before they hear you. Boost or lower the frequencies to all of your favorite games. Easily dismantle the SteelSeries 5H into 3 separate parts that easily fits into your bag or carrying case. The pull-out microphone is discrete so it's practically invisible when not in use. Soundcard Jack - 2x 3.5 mm, USB Headphones Frequency response - 16 - 28.000 Hz Headphones Impedance - 40 Ohm Headphones SPL at 1kHz, 1 Vrms - 110 dB Headphones Cable length - 3 meters (10 feet) Headphones Connectors - 3.5 mm Microphone Frequency response - 75 - 16.000 Hz Microphone Pick up pattern - Uni-directional< Microphone Sensitivity - -38dB Microphone Impedance - 2k Ohm Operating systems - Win XP, Vista, Win 2000, Win 98, Win ME, Mac OS X