Feature: Microcontroller: ATmega328A Operating Voltage (logic level)：5 V Input Voltage (recommended)：7-12 V Input Voltage (limits)：6-20 V Digital I/O Pins：14 (of which 6 provide PWM output) Analog Input Pins：8 DC Current per I/O Pin：40 mA (I/O Pins) Flash Memory：16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader SRAM：2 KB (ATmega328) EEPROM：1 KB (ATmega328) Clock Speed：16 MHz Support USB download and Power Support for external 5V ~ 12V DC power supply Support power supply by 9V battery Support ISP download CH340G Driver Download link : http://www.wch-ic.com/download/list.asp?id=126 OR http://www.5v.ru/ch340g.htm IDE for arduino Download link : http://arduino.cc/en/Main/Software Each of the 14 digital pins on the Nano can be used as an input or output, using pinMode(), digitalWrite(), and digitalRead() functions. Some pins have specialized functions: Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the CH340G USB chip. The Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (for Arduino Nano 3.x). It has more or less the same functionality of the official for Arduino, 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. Package Include : 2 X Nano Board 2 X USB Cable

This board is using the chips ATmega328P and CH340, Support ISP download; Support USB download and Power. More Breadboard Space:Nano's got the breadboard-ability of the Boarduino and the Mini USB with smaller footprint than either, so users have more breadboard space. It's got a pin layout that works well with the Mini or the Basic Stamp (TX, RX, ATN, GND ）on one top, power and ground on the other. It is a smallest, complete and breadboard friendly board. It has everything that for Arduino has (electrically) with more analog input pins and on board +5V AREF jumper, compatible with Windows, Mac and Linux operating system. The nano has 8 analog inputs,each of which provide 10 bits of resolution.By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the analogReference function. Analog pins 6 and 7 cannot be used as digital pins, some pins have specialized functionality. The Nano for arduino can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.