Lenovo X1 Tablet keyboard is ready to as external keyboard for any device. For instructions see http://spawn.link/using-a-lenovo-x1-tablet-keyboard-as-a-wired-keyboard/ : r/thinkpad
The ThinkPad X1 Tablet is like a Surface with a business twist | Engadget
Lenovo ThinkPad X1 Tablet Disassembly, internal photos and upgrade options
Lenovo ThinkPad X1 Tablet 3rd Gen: Don't buy a Surface Pro, buy this instead - OnMSFT.com