Headband headphones bluetooth headphones wireless headphones type of fitting on ear transmission mode cordless features collapsible adjustable headband function remote control function music function mute function sound functions passive noise reduction in line volume control bluetooth sensitivity 100 dbmw impedance 32 ohm frequency response 20 20000 hz max power handling 30 mw driver 30 mm length of cable 12 m jacks 35 mm usb colour black