... Built in lithium battery, 4,MP3 Player 5,Print logo,engraving logo . MP3 Player specifications :1,MP3 pen has pen,mp3,FM and record functions2,vMusic ... file formats: MP1,MP2,MP3,WMA,WMV,ASF ... Pen: could write when playing music6,Red LED light and green LED light indicates different state,easy to use.7, ...