RioRand (TM) Upgraded Ethernet Shield W5100 for Arduino UNO R3 & MEGA 2560 Duemilanove For all versions of arduino Main board, 2009 , UNO, mega 1280, mega 2560, Nano, Duemilanove With this Ethernet Shield, your Arduino board can be used to connect to internet Controller: w5100, works as server or client Comes with efficient library and examples Direct plug puzzle board, NO soldering needed