Portable mp3 player series sony a serie internal memory 16 gb data transfers bluetooth nfc storage media flash memory max memory expansion 64 gb memory expansion microsd audio functions equalizer repeat function shuffle volume limiting audio formats mp3 aac wav aiff wma flac alac he aac l pcm video formats mpeg4 wmv9 avc picture format jpeg display size 22 inch display diagonal 56 cm display resolution 320 x 240 pixels display type tft