This Ethernet Shield which is based on the Wiznet W5100 Ethernet Chip gives you an to get your Device Online. It is directly supported by official Ethernet Library. It adds a micro-SD card slot, which can be used to store files for serving over . It is compatible with the Duemilanove (168 or 328), for as well as (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. Colour:As shown Material:PC+Metal Package Contents: 1 x Ethernet W5100 Network Expansion Board Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.