Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino

This is a Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot for Arduino.

The Arduino Ethernet Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip. The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. The Ethernet W5100 Shield Network Expansion Board w/ Micro SD Card Slot supports up to four simultaneous socket connections.