The PoE HAT (C) is a 802.3af/at-compliantOver Ethernet accessory for the 3B+/4B.By using this small HAT and some proper 802.3af/at-compliant sourcing equipments, it is possible to provide both network connection and supply for your in only one Ethernet cableWhile providing stable for the , there's also a USB-A port for powering extra external device, Onboard high speed active cooling fan, better heat dissipationFully isolated switched-mode supply (SMPS).POE input voltage: 37V ~ 57V DC input, POE-USB Type A output voltage: 5V 4A (MAX), POE-Pin header output voltage: 12V 2A (MAX), Network standard: Support IEEE 802.3af/atPoE.While providing stable for the , there's also a USB-A port for powering extra external deviceProduct size: 56.5 x 65mmcolor:BlueMaterial:PCBPackage Contents:1 x PoE HAT (C)1 x Standoffs packOnly the above package content, other products are not included.Note:Light and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.