Features:
Ethernet Shield W5100 For Arduino 2009 UNO Mega 1280 2560

With this Ethernet Shield, your Arduino board can be used to connect to the internet.
It can be used as a server or client.
Directly plug the board; no soldering is required.
Controller: w5100.
This is the latest version of the Ethernet Shield.
This Arduino Ethernet Shield, which is based on the Wiznet W5100 Ethernet Chip, gives you an easy way to get your Arduino online.
It is directly supported by the 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 that connect to the internet using the shield.
Fits all versions of Arduino main boards: 2009, UNO, Mega 1280, Mega 2560.
MAC address: 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };.

Specification:

Item size: 73*53*23mm
Board weight: 31g