71 headset stereo pc headset usb headset design over ear types dynamic closed transmission mode cable types of connection 35mm jack usb usb 20 type of cable double sided length of cable 13 m sound modes 71 software surround headset type of headphones headband features active noise cancellation padded headband passive noise cancellation adjustable headband in line control volume control function mute max power handling 40 mw headphone transmis