SunFounder Mini USB Nano V4.0 ATmega328P 5V Micro Controller Board for Arduino Compatible Sunfounder Nano is created by the purpose of repairing a defect on the Arduino Nano ,it is the same in general and can replace the Arduino Nano 3.0. The Sunfounder Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x) or ATmega168 (Arduino Nano 2.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one. Before using, please check this link http://wiki.sunfounder.cc/index.php?title=SunFounder_Nano_Board