71 headset stereo pc headset design over ear type closed transmission mode cable type of connection usb 20 type of cable single sided length of cable 22 m sound modes 71 software surround headset type of headphones headband features adjustable headband headphone transmission range 20 20000 hz headphone impedance 32 ohm driver 40 mm number of drivers 1 microphone properties omni directional microphone number of microphones 1 microphone fre