How to decrease radio power of MikroTik RouterBOARD RB962UiGS 5HacT2HnT hAP ac

Hi,
I am new to this forum, so excuse me and my incompetence.
I would like to ask, how to decrease radio power of WiFi of MikroTik RouterBOARD RB962UiGS 5HacT2HnT hAP ac?
I own this device since a year, I live in a multifamily housing (apartment house) and I just realized that my WiFi signal is so strong
that I catch it from far distance (like passing by my house when riding tram I just log into my WiFi where there are no other signals from my house).
Another problem is that I have a few months old baby so I wish I could lower that signal so not to make harm to my child.
My firmware is RouterOS v6.40.4 (stable)
CPU MIPS 74Kc V5.0
CPU Frequency 720 MHz
Board Name hAP ac
Firmware Type qca9550L
Factory Firmware 3.29
Current Firmware 3.34
Upgrade Firmware 3.41

Best regards

Set regulatory domain mode, select your county and put higher antenna gain. The higher value the lower tx power…

Thank you for the reply,
I can’t find “regulatory domain mode” in webfig to change, could you please provide screenshot or breadcrumbs to follow?
Thanks!

See frequency mode option in the manual.
https://wiki.mikrotik.com/wiki/Manual:Interface/Wireless

You will need to click the Advanced Mode button in the Wireless Interfaces details window to see Frequency Mode, Country and Antenna Gain settings.