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The display uses in-plane switching (IPS) technology and is one of the brightest and richest screens I've seen. It shows 1600 x 900 resolution, a step up from the Lifebook's 1366 x 768 resolution. As with several other ThinkPads, the screen can be folded back so that the entire system is flat; this lets you stow it under a monitor stand with the keyboard sticking out.
The system comes with Intel's HD Graphics 4000 video engine. With 64MB of dedicated video memory, the X1 Carbon can also use up to 1.63GB of the X1 Carbon's system memory, providing access to nearly 1.7GB of video memory.
While the screen looks great, it might be a hassle connecting it on the road to a monitor or projector because the X1 Carbon has neither VGA nor HDMI ports. Instead, it relies exclusively on a Mini DisplayPort connection; Lenovo sells a $35with battery like Asus AP21-1002HA Battery , Asus Eee PC S101H Battery , Asus AP22-U1001 Battery , Asus Eee PC S101 Battery , Asus A32-R1 Battery , Asus 90-NGA1B3000 Battery , Asus C22-R2 Battery , Asus C21-R2 Battery , Asus N20A Battery , Asus A32-U6 Battery , Asus A33-U6 Battery , Asus U6S Battery adapter for VGA work.
Its other ports include one USB 2.0 and one USB 3.0 port, an audio jack and a flash card reader. Like many other ultrabooks, it requires a USB-based adapter to connect with a wired LAN; the dongle comes with the system. Along with Bluetooth 4.0 and 802.11n Wi-Fi, the X1 Carbon has Intel's WiDi technology for wirelessly sending video and audio to a compatible projector, TV or monitor.
In the back is a phone network SIM card slot that connects up with the system's integrated 3G mobile data card, which works with AT&T's HSPA+ network. There's no 4G LTE data option available.
The X1 Carbon has a black keyboard with deeply scalloped keys. The 19.4mm keys are comfortable and responsive with 1.6mm of depth. The system's backlit keyboard should appeal to night owls, but the X1 Carbon doesn't have the overhead light that's on the ThinkPad X230.