Portable mp3 player series trekstor ibeat internal memory 4 gb storage media flash memory audio functions equalizer voice recording audio formats mp3 mp3 vbr wma wav display resolution 132 x 32 pixels display type lcd battery life audio 20 h power supply aaa battery connections usb 20 function upgradeable firmware organiser id3 tag colour black dimensions 85 x 30 x 22 mm weight 26 g