Gigabit Ethernet Network Switch 5V Lan Hub LED Light Dynamic Indicator Device | eBay
Amazon.com: USB-C to Gigabit Ethernet Adapter, 10/100/1000 Mbps with Anodized Aluminum Sleeves and LED Status Indicators for MacBook, MacBook Pro/Air, iPad Pro, Chromebook, XPS, Galaxy S9/S8 and More : Electronics
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What do the lights next to an Ethernet cable mean? - Quora