I am interesting in purchasing a Deco X68 dual-unit, tri-band  router mesh network. 

I read all of the documentation I could find, but I could not determine how to change 2.4Ghz and 5Ghz channels.  My neighborhood has a fair amount of wifi routers.  I always like to find the least congested channels (frequencies).  Seems most of the neighborhood is on channel 1 or channel 6.  Currently channel 9 is my favorite on 2.4Ghz.  I currently use channel 112 on 5Ghz.  

In the current times with my present router, I use a browser to access the setup.  Is that still possible with these new, mesh routers?  This could be my first mesh purchase.

Thanks for any info.

Summest.