Arduino Mega 2560 R3 ATMEGA16U2 Original b18

ATmega2560 Funduino  Arduino Mega 2560 R3 Compatible Improved Version

Feature:

54 digital I/O input/output (of which 14 provide PWM)
16 analog inputs
4 UART (hardware serial ports)
16 MHz crystal oscillator
With bootloader, download the program directly via USB without external programmer
USB power supply, or AC-to-DC adapter and battery
Designed based on Arduino official one

Specification  OF Arduino Mega 2560 R3:

Microcontroller: ATmega2560
Operating Voltage: 5V
Input Voltage(recommended): 7V ~ 12V
Input Voltage(limits): 6V ~ 20V
Digital I/O Pins: 54 ( of which 14 provide PWM output )
Analog Input Pins: 16
DC Current per I/O Pin: 40mA
AC Current for 3.3V Pin: 50mA
Flash Memory: 256KB ( of which 4KB used by bootloader )
SRAM: 8KB
EEPROM: 4KB
Clock Speed: 16MHz

Arduino UNO DIP R3 & SMD with USB cable Optional in Paksitan

ATMEGA2560 Mirco USB Development Board CH340G for Arduino MEGA 2560 Pro