71 headset stereo pc headset usb headset design over ear type closed transmission mode cable type of connection usb 20 type of cable single sided length of cable 15 m sound modes 71 software surround headset type of headphones headband features padded headband adjustable headband in line control volume control function mute sound system dts headphonex 71 headphone transmission range 10 28000 hz sensitivity 80 dbmw driver 50 mm microp