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
Lenovo ThinkPad X1 Tablet Gen 3 i7 8th Gen 16GB 256GB SSD WIN 10 Laptop 743702 | eBay