Geekcreit MEGA 2560 R3 Development Board MEGA2560 With Ethernet Shield W5100 For Arduino

Ethernet Shield W5100:

It is directly supported by Arduino official Ethernet Library.
It adds a micro-SD card slot, which can be used to store files for serving over the network.
It is compatible with the Arduino Duemilanove (168 or 328), UNO as well as Mega (1280/2560) and can be accessed using the SD library.
The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP.
It supports up to four simultaneous socket connections.
Use the Ethernet library to write sketches which connect to the internet using the shield.
MAC address: 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }

Mega 2560:

Microcontroller: ATmega2560
Operating voltage: 5V
Input voltage (recommended): 7-12V
Input voltage (limits): 6-20V
Digital I / O pins: 54 (of which 14 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 4 KB used by bootloader
SRAM: 8 KB
EEPROM: 4 KB
Clock Speed: 16MHz

Package included:

1 x Ethernet Shield W5100
1 x Mega 2560 with USB cable