The Mega 2560 is a micro-controller board base on the ATMEGA16u2. It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything need to support the micro-controller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get start. The Mega is compatible with most shields design for the Duemilanove or Diecimila. Specification of Arduino MEGA 2560 R3 ATMEGA16U2 Programing Board: Microcontroller ATMEGA16u2 Operating Voltage 5V Input Voltage (recommended) 7-12V Input Voltage (limits) 6-20V Digital I/O Pins 54 (of which 15 provide PWM output) Analog Input Pins 16 DC Current per I/O Pin 40 mA DC Current for 3.3V Pin 50 mA Flash Memory 256 KB of which 8 KB used by bootloader SRAM 8 KB EEPROM 4 KB Clock Speed 16 MHz Dimensions : 111 x 54 x 12 (LxWxH) mm. Package Include: 1 x Arduino MEGA 2560 R3 ATMEGA16U2 Programing Board In Pakistan