About Uno R3: This is the latest version of the Arduino Uno circuit board. This new board incorporates an ATmega16U2 chip in place of the ATmega8U2 which provides increased transfer speeds and bigger memory. This board is an Arduino compatible and is designed to be 100% compatible to the Arduino open source standard. Its layout strongly adheres to the revision 3 standard in both software and hardware; you should see no difference in quality or functionality to an equivalent Arduino brand board. Obviously, you can always return it if you are not satisfied within 14 days of receiving it and we refund your money. About Arduino: Arduino is an open-hardware platform based a circuit board with a micro controller and an expansion base designed for making easier the use in multidisciplinary projectsSPECIFICATIONSMicrocontroller ATmega328Operating Voltage 5VInput Voltage (recommended) 7-12VInput Voltage (limits) 6-20VDigital I/O Pins 14 (of which 6 provide PWM output)Analogue Input Pins 6DC Current per I/O Pin 40 mADC Current for 3.3V Pin 50 mAFlash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloaderSRAM 2 KB (ATmega328)EEPROM 1 KB (ATmega328)Clock Speed 16 MHzAbout Arduino: Due to its ease of operation and accessible price, Arduino constitutes an ideal tool for students, teachers, designers and those interested in electronics and robotics. The software for downloading is free for Mac OS x, Windows and Linux.Being open hardware it can be used freely for the development of any project without the need to apply for a licence.The Arduino project received an honourable mention in the Ars Electronique de 2006 awards. Please contact us, if you need more information.