Features: With this for Ethernet Shield, your board can be used to connect to internet. Can be used as server or client. Directly plug puzzle board, no soldering required. This for Ethernet Shield is based on the W5100 for Ethernet Chip It adds a small memory card slot, which can be used to store files for serving over the network. The W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the for Ethernet library to write sketches which connect to the internet using the shield. Fits for main board for mega 1280, for mega 2560. Specifications: Controller: W5100 Size: 7.4 x 5.4 x 2.4cm / 2.90 x 2.12 x 0.94inch Weight: 29g Package Included: 1 x for Ethernet Shield 1、With this for Ethernet Shield, your board can be used to connect to internet 2、Can be used as server or client 3、Directly plug puzzle board, no soldering required 4、This for Ethernet Shield is based on the W5100 for Ethernet Chip 5、It adds a small memory card slot, which can be used to store files for serving over the network