mp3 player usb digital used for music play, radio receiving with usb ... 800 pcs per day to output moq:500 pcs mp3 player usb digital Item No.: ES-212Specification:mp3 playerUsed for ... to play musicWith Line-in function, can be connect the othe audio player to player musicKey Function: Previous,next,pause,volume regulating, FM ... , can be connected to earphone or multimedia speaker mp3 player usb digital