no idea about this~
You'd better email to tp-link support for details~

Did you find anything on the output power?

I'm trying to use the WN8200N as a access point and I get terrible coverage (radius of 1 meter or less).
Everything works within that range.

I tried various driver options to turn off power saving features and such, but have not been able to improve my range.
I cannot understand why the range of this product should be good if it's TX power is much lower than whats usual. I mean even if the antennas are super-sensitive that's only the RX part of the communication and it won't really improve the range on it's own?