Power Over Ethernet (PoE) HAT for Raspberry Pi 3 B+ 4 and 802.3af PoE
Amazon.com: Dual Gigabit Ethernet Base Board Designed for Raspberry Pi Compute Module 4 or Being Integrated into End Products @XYGStudy (CM4-DUAL-ETH-BASE) : Electronics
Best Raspberry Pi Accessories of 2024 | Tom's Hardware