71 headset stereo pc headset usb headset wireless headset design over ear type closed transmission modes radio cable wireless types of connection 35mm jack usb usb 20 radio range 10 m type of cable single sided operating time 15 h sound modes 71 software surround headset type of headphones headband features control via headset onoff switch padded headband adjustable headband volume control function rechargeable sound system dts headphonex 7