diff --git a/vars/local_vars_medium.yml b/vars/local_vars_medium.yml
index d7e4bf712..766d67fca 100644
--- a/vars/local_vars_medium.yml
+++ b/vars/local_vars_medium.yml
@@ -43,6 +43,10 @@ iiab_domain: lan
 iiab_home_url: /home
 # You might also want to set captiveportal_splash_page (below!)
 
+# WARNING: IF YOU CONNECT YOUR IIAB'S INTERNAL WIFI TO THE INTERNET OVER 5 GHz,
+# YOU'LL PREVENT OLDER LAPTOPS/PHONES/TABLETS (WHICH REQUIRE 2.4 GHz) FROM
+# CONNECTING TO YOUR IIAB'S INTERNAL HOTSPOT.  See "wifi_up_down: True" below.
+#
 # Raspberry Pi OS requires Wi-Fi country since March 2018.  Please set it here:
 host_country_code: US
 host_ssid: "Internet in a Box"