... lithium battery, 4,MP3 Player 5,Print logo,engraving logo . MP3 Player specifications :1,Support Multi-languages2,Supports MP3/WMA/WAV formats3 ... (nature,Rock,POP,Classic sofe,Jazz DBB4,Supports MP3/WMA/WAV formats5,White backlight6,Inside lithium battery, ... support continuously playing over 5 hours.7,FM function(optional) if you want,pls add USD ... /Green10,Dimension: 86 X 15 mm. MP3 Player