John 
Feature:
1, can by the chip's link to the computer USB, USB port can read hang TF card or the content of the SD card, as a card reader
2, complete serial port control command, usb SD card SPI control freely back and forth, 9600 standard protocol, simple and convenient3, two groups of AD, standard with MP3 function, function set of keys and 14 buttons one-to-one function
4, support renaming the function, is no longer restricted by after be being put first deposit, flexible and humanization
5, peripheral super easy, don't need the resistance capacitance can work normally
6, support the function of the infrared remote control, can play any song
7, with memory function (24 our fleet to hang)
8, stability, high performance-price ratio
9, sound card function
