The Arduino MKR ETH shield is a new-age product that allows having a wired Ethernet connection between your MKR board and your network or the Internet. This is particularly useful for devices located where either electromagnetic noise is a problem or there are special safety requirements. It enables an MKR board to connect to the internet using the Ethernet 2 Library and to read and write to a microSD card using the SD Library. The MKR ETH Shield is based on the WIZnet W5500 Embedded Ethernet Controller, which provides a network (IP) stack capable of both TCP and UDP. It supports up to eight simultaneous socket connections.

Operating voltage is 3.3V
The connector type is RJ45 female

ANSI/ESD S20.20:2014
BS EN 61340-5-1:2007