The Mega 2560 is a board based on the 8-bit AVR microcontroller ATmega2560 by Atmel. It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analogue inputs, 4 UARTs (hardware serial ports). It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable. The Mega 2560 board is compatible with most shields designed for the Uno.
You can Purchase the discounted original Mega 2560 Board, Here.