... factory produce experience *original chips,good battery *mp3 player with expandable memory *mp3 music player Mp3 Player with expandable memory mp3 music player,no memory support expand card,2G,4G ... Weighing less than 30 g. Concise, delicate, fashion. 2, Support mp3,wma music format. 3, can use to be TF ... 1.When you charging for the mp3 player,pls turn on the switch. 2.When you charging connect USB by ...