alzhao
241
I see.
Channel 161 supports 80Mhz
Channle 165 support 20Mhz
They are only limited to 25mWatt output, by regulation.
But in the router, if comes with Europe country code, this channels is disabled completely. This is due to some settings in the wifi driver and designed like this.
Even you can use, 25mWatt should be very weak signal. I am not sure why your current wifi use that.