Usb headset stereo pc headset system requirement windows 7 vista xp intel based mac leopard or above suitable for live messenger online gaming music chatting and telephony skype design on ear transmission mode cable types of connection usb usb 20 length of cable 25 m sound mode 20 hardware type of headphones headband features adjustable headband in line control volume control function mute weight 255 g included in delivery user manual usb cab