What is a tri band router? A tri band router broadcasts 3 separate bands. It will broadcast a 2.4 GHz band, and it will broadcast 2 separate 5 GHz bands. It's like having 3 separate networks in one device.
Here is the Tri-band router that I recommend (affiliate) https://amzn.to/35DlTy3
I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.