Wireless headset stereo pc headset 71 headset design over ear transmission modes wireless bluetooth radio type of connection usb 20 radio range 10 m operating time 8 h sound modes 71 software surround headset type of headphones headband features passive noise cancellation one ear monitoring padded headband adjustable headband control via headset onoff switch volume control functions voip rechargeable pairing headphone transmission range 20 2000