... , 3,Built in lithium battery, 4,MP5 Player 5,Print logo,engraving logo . MP5 Player specifications :1,1. 3.0 inch 16 ... mode:natural,rock,popular,classical,soft,jazz, DBB8.User-defined.With software PlayFX sound effect9.E-book function,support TEXT file ... 8DIGITAL15.Sound: built in speaker stereo design16.Colour:silver MP5 Player