Standard Raspberry Pi 40PIN GPIO header, supports Raspberry Pi 3B+/4B; PoE (Power Over Ethernet) capabilityIEEE 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