Based on the Raspberry Pi 40pin GPIO interface, this board design provides a oriented pin for easy access to other RPi expansion boards. PoE powered internet and power: Simply connect a network cable to a PoEenabled device to give the Raspberry Pi internet access while also delivering power through the PoE connection. Power delivery and versatility: The 5V output can supply up to 4.5A (up to 25W). The system supports a total output power across 12V and 5V rails, enabling power to additional devices while maintaining stable power for the Raspberry Pi. Onboard active cooling: An integrated cooling fan accelerates heat dissipation, helping the motherboard run more stably during operation. Use scenarios Home lab or small server: Use the PoE connection to provide both network access and power to the Raspberry Pi, while the 5V output can power attached peripherals, with active cooling helping sustained operation. Edge networking or classroom deployment: Deploy as a compact network gateway or edge device that can power sensors or peripherals via the 5V rail while staying connected to the network through PoE. Compact IoT gateway or media setup: In tight spaces, leverage the access GPIO for expansion boards and rely on the cooling fan to manage heat during continuous use, with stable power delivery to the Pi and connected devices.