1、Applicable Models: This is a Power over Ethernet (PoE) mini expansion board for Raspberry Pi 3B+ 4B, supporting IEEE 802.3af 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.