Portable mp3 player sports mp3 player series sandisk sansa clip internal memory 8 gb storage media flash memory memory expansion microsd audio functions repeat function audio recording equalizer voice recording shuffle volume limiting audio formats audible flac mp3 ogg wma wma drm station memory 40 display size 1 inch display diagonal 254 cm display type oled battery life audio 15 h power supply internal battery connections usb 20 headphon