Standard Raspberry Pi 40PIN GPIO header, Raspberry Pi 3B+/4B mounts ^^ PoE (Power Over Ethernet) capability, IEEE 802.3 af/at-compliant ^^ Fully isolated switched-mode power supply (SMPS) ^^ While providing stable power for the Raspberry Pi, there's also a USB-A port for powering extra external device ^^ Onboard high speed active cooling fan, better heat dissipation