Sony nw wm1z high resolution audio walkman 256 gb memory s master hx engine gold elevating the high resolution sound experience from one you listen to to one you can feel delight in pure detail experience a symphony of detail with the signatures series walkman combining sophisticated sound technology with beautifully crafted high grade materials and class leading usability pure sound premium parts discover the functional beauty of oxygen free copper the nw wm1z is fully encased in a h