Your comment should not be gray, as you've stated a rarely known fact. I used to have an old brochure with the exact model number of the device you refer to. And it's been around for well over a decade.

I'll try to find the model to rescue your post. People can be so fucking unreasonable here it makes me sad.

But I know exactly what you're referring to.

Note: it's also worth considering its applications in parallel construction and that it's indeed so rarely known, that it doesn't require a warrant.

Edit: https://en.m.wikipedia.org/wiki/Range-R

Edit II: they were, at one time around 2011 definitely having a lot of fun with these devices in my town here in Florida.

Edit III: also of interest, https://camero-tech.com/

Edit IV: https://www.policemag.com/technology/article/15541542/first-... - Detex Pro, by MaXentric

Thank you! I wanted to provide a source, but I have literally only seen it in action at a trade show, and could not remember what it was actually called.