This is a combination of both the WIZnet W5500 and a Raspberry Pi RP2040. If you're not familiar with the WIZnet W5500, this is an Ethernet controller module.

Available to purchase for £8 or $8 depending on your location the Maker Nano RP2040, as the name suggests, features a Arduino Nano form factor and is powered by a Raspberry Pi RP2040.