[slug]

Cheap FRS walkie-talkies, can find plenty of these on ebay if don't want to buy new (will need new batteries though).

https://en.wikipedia.org/wiki/Family_Radio_Service

[Bender]

My entire community use it. We set channel and CTSS to our area code so people can remember it. I also have intercoms that use it.

Outside of the legal realm there are also ham radios that are either easy to frequency unlock or are pre-unlocked to do FRS+DMR for encryption though I would never do this outside of a dummy load.

[sevensor]

Frs was everywhere for a minute, and it seems like it’s been completely forgotten. Perfect for the application, basically the intended purpose.