Product features ? Deliver the original sound of music of all genres. THE HEADPHONES OF SONY ? Clearly express the sound included in the high resolution sound source with a newly developed 40 mm HD driver unit that realizes broadband playback ? Enjoy listening for a long time comfortably, excellent wearability ? It supports low-distortion, delicate sound with low noise, balanced connection. Bundled cable with ?4.4 mm balanced standard plug that can be balanced with Walkman ? Removable type of cables can be used separately ? Newly developed aluminum coated LCP diaphragm adopted ? Adopted Fibonacci Pattern Grill allowing smooth ultra-high frequency characteristics ? Damping housing that suppresses unnecessary vibration ? Beat response control to accurately reproduce the rhythm of heavy bass ? Reduce size and weight ? Three-dimensional molded ear pad which adopted low repulsion urethane foam ? Enfolding structure to realize wearing wrapping ? Silent joint that reduces rattling of moving parts ? Inword Axis Structure ? Adopted silver coated OFC wire ? Swift mechanism easy to store ? Carry pouch convenient to carry ? ? ? Detailed description By "Newsbridge" ? ? ?