71 headset stereo pc headset usb headset design over ear type dynamic transmission mode cable types of connection usb usb 20 type of cable single sided length of cable 3 m sound modes 71 hardware surround headset type of headphones headband features volume control in line control passive noise cancellation adjustable headband intergrated sound card function mute number of drivers 5 microphone properties omni directional microphone flexible microp