Having received just today morning in South Korea, thank you for the safe packaging.
first, it was quite hard time to get used to typing with this smallest keyboard I've ever had, and I still don't know where the "Caps Lock" key function is.
I hope you supply A Good Manuals to use it, and this is quick guide for the users.

there are 3 lights on the left side of this keyboard, from the top, this order below;
1. Fn key function ON/off (toggle)
2. Pn key function ON/off (toggle)
3. Scroll lock function ON/off

and Pn key(left) is for blue printed key function, which is left position of keycaps printed,
on the other side, Fn key(right) is for red printed key function, which is right position of keycaps printed.

I hope get my answer for "Caps Lock" key function, and my quick guide would be helpful for the next customers. **MK Note - Press Pn+Tab to turn on/off Capslock.**