OVERVIEW: Isolate yourself from external noise with industry-leading noise cancelation Enjoy Bluetooth wireless connectivity and Hi-Fi quality audio,Driver Unit 40mm, dome type(CCAW Voice Coil) ,Frequency Response (Hz) 4Hz-40,000Hz Listen to ambient sounds quickly and clearly with Quick Attention Hear music at its best with Hi-Res Audio Listen longer with up to 20 hours of battery life,Control everything by touch with Easy Touch control