Usb headset stereo pc headset design on ear transmission mode cable types of connection usb 11 usb 20 type of cable single sided length of cable 3 m sound mode 20 hardware type of headphones headband features volume control functions dsp technology mute headphone transmission range 20 20000 hz headphone impedance 32 ohm microphone properties noise cancelling microphone flexible microphone arm microphone frequency range 100 10000 hz micropho