For Arduino is an open source tech. it can be used for all companied for free.
Our product is not the original Italian item. it is our own product made in China.
If you need an original Italian product, please buy it from Italian. our item is cheaper than it.
For Arduino Ethernet shield
W5100 TCP/IP by wire-wrap header with for arduino products,
4 1.0 interface beside ARFF and RESET.
PoE power-over-Ethernet, standard IEEE802.3af