broodwich82

That's a very good point, I guess what I'm looking for will be a u.FL (or whatever connector on the 2230 card) to external dual-lead dual-band MIMO antenna... so, probably u.FL to RP-SMA, and a little 2x MIMO antenna with RP-SMA leads... which @eselarm had suggested, as it turns out. Won't the signal be almost completely attenuated by the metal casing itself?

I'm asking specifically about the antennas, not the card. There are holes in the metal case offered by FriendlyElec which appear to be for antennas. I'm asking what antennas, specifically, would be compatible with those holes.

I see from photos of the FriendlyElec metal case (without display) for the NanoPi M6 that there appear to be two holes for wifi antennas. Does anyone know if the optional wifi card sold by FriendlyElec comes with antennas? If not, are they a standard size which I can buy somewhere else?