Mp4 player portable mp3 player internal memory 4 gb memory expansion microsd audio formats mp3 wma video formats amv picture formats jpeg bmp display size 18 inch display diagonal 457 cm display types lcd tft battery life audio 8 h power supply li ion battery connections usb 20 headphone 35mm jack organiser e book reader dimensions 41 x 88 x 12 mm weight 32 g