A carbon fibre reinforced chassis, the new X1 Carbon is just as durable as its predecessor, and it a smaller footprint making it our lightest, thinnest X1 Carbon ever. Yet it's packed with more power than ever up to Windows 10 Pro, 7th generation Intel Core processors, lightning fast Thunderbolt 3, and up to an option of a 14inch QHD display. Even when WiFi is out of range, the new X1 Carbon has LTE-A (4G) option available so you’ll always have connectivity and access to all your data and apps in the cloud. The X1 Carbon includes Intel Thunderbolt 3 the technology that brings lightning fast Thunderbolt to USB-C at speeds up to 40 Gbps. Connect a cable from your USB-C port to a Thunderbolt 3 enabled device, and get four times the data and twice the video bandwidth of any other port type, while also supplying power. So you get Thunderbolt, USB C, and DisplayPort. Plus, you can even output to two 4K displays with the Thunderbolt Dock.