R7000 is 2.4 GHz but AC1900 Extender is 5GHz - I need to change extender to 2.4GHZ

> My cameras [...]

   Not a very detailed description.

> [...] cannot connect to 5GHz so I need to change my AC1900 extender to
> 2.4 GHz [...]

   Says who?  Why?  In many cases, what's actually needed is to get some
phone/tablet (with the critical app) to connect to the 2.4GHz radio.  If
you can select to which radio the phone/tablet connects, then the mere
existence of a 5GHz radio should not be a problem.  If you can't select
to which radio the phone/tablet connects, then disabling the confounding
5GHz radio should be helpful.

   "AC1900" is a speed, not a model number.  Look for "Model" on the
product label.  With that datum in hand, visit
http://netgear.com/support , put in your model number, and look for
Documentation.  Get the User Manual (at least).  Read.  Look for a topic
like, say, "Disable or Enable the WiFi Radios".

      https://community.netgear.com/t5/x/bd-p/home-wifi-range-extenders