Fiire. com products

I have a couple of questions about the Fiire products, but the website refers questions about their products here.
Well, I'll give it a go.

I am really considering going the "hard" way and order a Fiire station and a Chief.
There are however a few considerations since I do live in Europe (Norway to be precise).

What's the frequency band for the Fiire remote, and is it legal in Europe?
There are rules that normally will not let me use US equipment with transmitters, even some channels on wireless LAN.

I would think, but would like to be certain, that the Fiire products are compatible with 230V?

And what would be the referer reference for Paul, so that if I do buy, he get's a piece of the cake?