I know it seems stupid, but I may want to reduce the TX power of my new RT-AC86U as my wife didn't like the idea of having too strong a coverage in the bedroom. Is the TX power adjustment under Wireless Professional tab the only way to do so? Something with Balance, Good, Performance to choose from. From the Wifi analyzer, the signal did seem to be lesser by changing the settings.

If change the area to China will it lower the mW of the TX transmit power too?