The Raspberry Pi Power over Ethernet HAT is a small accessory for the Raspberry Pi computer. The Raspberry Pi PoE HAT powers a Raspberry Pi 4 Model B and Raspberry Pi 3 Model B+ via an Ethernet cable. Power-sourcing equipment is required on the Ethernet network. The PoE HAT allows you to power your Raspberry Pi using Power over Ethernet–enabled networks; for this product to be used, the network it is connected to needs to have power-sourcing equipment installed.
An Ethernet cable
Power-sourcing equipment for a 802.3af Power over Ethernet network