The PoE HAT (C) is a 802.3af/at-compliant Power Over Ethernet accessory for the Raspberry Pi 3B+/4B. By using this small HAT and some proper 802.3af/at-compliant power sourcing equipments, it is possible to provide both network connection and power supply for your Raspberry Pi in only one Ethernet cable 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 Fully isolated switched-mode power 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/at PoE. While providing stable power for the Raspberry Pi, there's also a USB-A port for powering extra external device Product size: 56.5 x 65mm color:Blue Material:PCB Package Contents: 1 x PoE HAT (C) 1 x Standoffs pack Only the above package content, other products are not included. Note: Light shooting 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.