Portable mp3 player mp4 player internal memory 64 gb data transfer wlan storage media flash memory max memory expansion 128 gb memory expansion microsd audio functions audio recording audio formats wav flac aiff alac ogg ape aac dff dsf dsd output mw 2300 mw display size 33 inch display diagonal 838 cm display resolution 480 x 800 pixels display type tft display properties touchscreen power supply rechargeable polymer lithium battery con