[. . . ] [. . . ] The USB adapter, with integrated sound card chip, plugs into any USB port to ensure marvellous sound no matter where you play. Gives you the unique 3-D, 360° sound experience ­ sound from all sides including above and below Adjustable headband for a perfect fit Adjustable, bendable and pivotable microphone makes the voice more clear and increases comfort and flexibility Noise-cancelling microphone provides high speech clarity and voice recognition by filtering out noise around you In-line volume control and mic mute switch to keep sound at right level or have a side conversation in privacy Equipped with a single-sided extra thick cable for maximum robustness Technical data Headphones Frequency response . . . . . . . . . . . . . . System requirements 80 Hz ­ 15, 000 Hz Unidirectional (-) 38 dBV/Pa 2 k Win 98 SE (and above) and Mac OS 10. 3. 9 (and above Cable length 3 m / 10 ft Connector plug . . . . . . . . . . . . . . . . . . . . . . . USB Accessories Included: Microphone windscreen 2 adaptors to 3. 5mm stereo jack for both voice and mic PC sockets Optional: Replacement leatherette headband pad Replacement ear cushion [. . . ] [. . . ]