1、Applicable Models: This is a Power over Ethernet (PoE) mini expansion board for Raspberry Pi 3B+ 4B, supporting IEEE 803af network standard. 2、Power Over Ethernet: Supports PoE power over Ethernet, allowing for Raspberry Pi to be networked and powered by a single network cable to a PoE device 3、Fully Isolated Switch Mode: The Mini expansion board features a fully isolated switch mode power supply (SMPS) and supports access to cooling fans 4、Flexible: Expansion board adopts a more compact component layout, smaller overall size, more flexible use 5、PCB Material: Mini expansion board is made of PCB material, which will not deform for a long time, thus ensuring long term stability. 1 x POE Mini Expansion Board Item Type:POE Mini Expansion BoardMaterial: PCBModel: PoE HAT（E）POE Input Voltage: 37V to 57V DCPOE Output Voltage: 5V 2.5A DCNetwork Standard: 802.3af PoEScope of Application: Applicable to for Raspberry Pi 3B+ 4B