Headband headphones noise cancelling headphones series philips shl philips citiscape type of fitting on ear transmission mode wired features collapsible adjustable headband microphone headset compatible with ios sound functions in line volume control active noise reduction sensitivity 106 dbmw impedance 32 ohm frequency response 18 22500 hz max power handling 50 mw driver 40 mm types of cable single sided straight cable flat cable removable cable