general size,surface polishing, without blemish,encaosulation IC, with usb and SD card interface,easy to use,and durable. Commodity name: ... blemish,encapsulation IC,bitmap screen,with english display function,with usb and SD card interface,no memory card. Operating characteristics: Copy the ... MP3 to the SD card or U plate, and then put the on-board MP3; The on-board MP3 is inserted into the ...