Hereby declare:
In the same performance guarantee NANO and master chip ATMEGA328P-AU same premise, We replaced the USB chip,Improved download speed, Increase the stability of the win7 win8.but it does not support MAC

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Usage:
1 download for arduino 's IDE
2 USB chip driver download;
3 Plug NANO development board, the driver will automatically install
4 Select the card inside the die NANO
5 Select the COM port that my computer can query your NANO board just inside the port
6 best first choice , for arduino own routine procedures , burn inside.

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Advantages :

1. a completely solve the traditional UNO board is not compatible with win7 and win8 system instability above .

2.  increase the pin socket , to facilitate the use of DuPont line.

3 . Replaced 16u2, so the cost is reduced by half, to get the maximum benefit consumers