The X210 is an X201 chassis with:
A Core i7 8550u (4 cores, turbo boost up to 4GHz)
2× DDR4 SODIMM slots. I put 32 GB of RAM in.
2× mini PCI Express slots. There’s an 802.11/Bluetooth card in one. The other is empty but could be used for LTE or a second wireless card.
An M.2 NVMe slot. I put a 2TB SSD in it.
A 2.5” SATA bay. I left it empty, but it’s possible to put a second SSD in.
An upgraded screen (12.6 inch, 2880×1920, 450 nits, wide gamut). The bezel is cut to make room for the 3:2 aspect ratio. There is no webcam.
Mini DisplayPort & VGA out.
3× USB 3.1 ports (no USB-C).
SD card reader.
Physical switch to toggle Wifi/Bluetooth.
Headphone & microphone jacks.
Internal microphone & speakers.
The X210 is sold as either a motherboard that you install into your own chassis or as a barebones laptop where you bring your own RAM, SSD, and battery. I got the barebones kit.