This is the new Arduino compatible Mega 2560. The new ATMega16U2 chip allows for faster transfer rates and more memory. No drivers needed for Linux or Mac
- Two new pins are placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes
- Works with all existing shields but also compatible with new shields that require the additional pins.