Powers your Raspberry Pi with a single Ethernet cable plugged in
The Arducam Mini PoE HAT for Raspberry Pi 4B / 3B+ is to use with the Raspberry Pi models with PoE pins like Raspberry Pi 3 Model B+ and Raspberry Pi 4 Model B, so you can power the Raspberry Pi with a single Ethernet cable plugged in.
Note: You will need PSE (Power Supply Equipment) to supply PoE signal to the Raspberry Pi, such as a PoE switch or injector