Features:<br />Pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin? the IOREF that allow the shields to adapt to the voltage provided from the board. In future? shields will be compatible both with the board that use the AVR? which operate with 5V and with the Arduino Due that operate with 3.3V. The second one is a not connected pin? that is reserved for future purposes.<br />Stronger RESET circuit.<br />Atmega 16U2 replace the 8U2.<br /><br />Specifications:<br />Microcontroller: ATmega2560<br />Input Voltage (recommended): 7-12V<br />Input Voltage (limits): 6-20V<br />Digital I/O Pins: 54 (of which 15 provide PWM output)<br />Analog Input Pins: 16<br />DC Current per I/O Pin: 40 mA<br />DC Current for 3.3V Pin: 50 mA<br />Flash Memory: 256 KB of which 8 KB used by bootloader<br />SRAM: 8 KB<br />EEPROM: 4 KB<br />Clock Speed: 16 MHz<br />Product size: 10.3 * 5.4 * 1.2cm / 4.1 * 2.1 * 0.5in<br />Product weight: 35g / 1.2oz<br />Package dimensions: 12.5 * 14.5 * 1.5cm / 5.0 * 5.7 * 0.6in<br />Package weight: 66g / 2.2oz<br /><br />Package List:<br />1 * Mega2560 R3 2013 Version<br />1 * USB Cable<br><img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-1-1654.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-5-1654.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-3-1654.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-4-1654.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-7-1654.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-8-1654.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/tt/h/1/h12333-6-1654.jpg" /><br>