... memory, support card intserted and listen to music 2.support MP3 format /wma/amv 3.fast delivery & lower price HOT SELL ... card reader , mobile flash disk , data storage 4.Color apition: black.bue,pink ,white,etc 5.Built-in lithium batteries power ... higher version)"Colors: red, white, blue, and black, pink"Support MP3 / WMA/AMV; Support MP3"The lithium battery, played three to four hours;