Lambent Digitel Display mp3 Player - Assorted Color Battery Built-in rechargeable Li-ion battery, directly connect with PC, It can be used as a card reader through its USB connector, it is very convenient to read, store or delete the files on a MICRO SD/T-FLASH storage card., Handy and movable mp3 player, USB 2.0 Interface, Rechargable hence no external batteries required, External storage upto 4gb, Battery Life more than 6 hours, No screen, Function : Card Reader, No internal memory. No memory card is included with the package.