Enjoy rich quality sound with these sony outdoor headphones mdr zx310 these headphones feature a lightweight and closed type supra aural design for portability and comfort the earcups can swivel and fold so you can shape your headphones to fit in your bag or backpack lightweight folding design for ultimate music mobility 30mm ferrite drivers for powerful balanced sound 10ndash24000hz frequency range padded earcups for comfortable listening cord length 12m