Specifications:
Based on the W5100Based on the Wiznet W5100 allows an Arduino board to connect to the internet.
Stackable Design, can directly be supported by Arduino official Ethernet Library.
Supports up to four simultaneous socket connections
Can be used to store files for serving over the network.
Can be accessed using the Mini SD TF library.
IEEE802.3af compliant
Low output ripple and noise (100mVpp)
Overload and short-circuit protection