StarTech.com 2.5GbE USB A to Ethernet Adapter, NBASE-T NIC, USB 3.0 Type A 2.5 GbE /1 GbE Multi Speed Gigabit Network, USB 3.1 Laptop to RJ45/LAN, Lenovo X1 Carbon, HP EliteBook/ ZBook -
Lenovo USB-C to Ethernet Adapter | Lenovo US
Lenovo Thinkpad X1 Carbon 4th Gen Wireless LAN Card Replacement - iFixit Repair Guide
ThinkPad USB3.0 to Ethernet Adapter | Lenovo US
Wireless, Speakers, Noise, and Accessories - The Lenovo ThinkPad X1 Carbon Review (2015)