Item Type:POE Mini Expansion Board Material: PCB Model: PoE HATE POE Input Voltage: 37V to 57V DC POE Output Voltage: 5V 2.5A DC Network Standard: 802.3af PoE Scope of Application: Applicable to for Raspberry Pi 3B 4B1Applicable Models: This is a Power over Ethernet (PoE) mini expansion board for Raspberry Pi 3B 4B, supporting IEEE 802.3af network standard. 2Power 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 3Fully Isolated Switch Mode: The Mini expansion board features a fully isolated switch mode power supply (SMPS) and supports access to cooling fans 4Flexible: Expansion board adopts a more compact component layout, smaller overall size, more flexible use 5PCB 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&nbspMini&nbspExpansion&nbspBoard