Thanks!! I did check already.

I am feeling idiot right know, I will respond to my self: TPlink App, click on one of my devices, then click in the device icon at the top and hardware/firmware details will pop up. And one is V4 and...

Hi guys, I had a couple of RE190. I suspect one is V4 and other V5, because they have different firmware versions and they cannot be updated at the same version, but I am not sure. Does anyone know...