The ethernet shield with wiznet W5100 ethernet chip.
Ethernet W5100 R3 Shield Network Board, Compatible with Arduino (168/328) / Mega (1280/2560) / UNO / R3.
The Ethernet W5100 network expansion module for Arduino can be used as server or client, it allows the Arduino to be a simple Web server.
Supports reading and writing mini SD / TF card. Direct plug puzzle board,supports SD card up to 2GB, supports 2009, UNO, mega 1280, mega 2560, Nano, Duemilanove. NO soldering needed.
It is meet IEEE802.3af standard and compatible with existing PoE module.