Features: brand new and high quality The PoE HAT is an 802.3af-compliant Power Over Ethernet accessory for RaspberryPi 3B+/4B. By using this small HAT and some proper 802.3af-compliant power sourcing equipments, it is possible to provide both connection and power supply for RaspberryPi in only one Ethernet cable. Supports for RaspberryPi 3B+/4B. PoE (Power Over Ethernet) capability，802.3af-compliant. Fully isolated switched-mode power supply (SMPS). On-board high speed active cooling fan, better heat dissipation. Specifications: POE power input: DC37V-57V Power output: 5V 2.5A Standard: 802.3af PoE Size:Approx, 58.90x54.92mm/2.31x2.16inches Package Includes: 1 Set Expansion Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.