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waveshare Power Over Ethernet (PoE) HAT for Raspberry Pi 4B/3B+, 802.3af/at PoE Network Standard, 5V USB-A&12V Header Outputs, PoE HAT Onboard Cooling Fan and MP8676 Buck Chip, Isolated : Electronics - Amazon.com
HiLetgo W5100 Ethernet Network Shield W5100 Ethernet Expansion Board with SD Card Slot for Arduino UNO MEGA2560
PoE HAT E for Raspberry Pi 4B/Raspberry Pi 3B+, Power Over Ethernet (PoE) Support 802.3af PoE Network Standard, Compatible with Raspberry Pi Official Case, Support Connecting Cooling Fan
Amazon.com: SunFounder Ethernet Shield W5100 Compatible with Arduino UNO R3 Mega 2560 1280 A057 : Electronics