I have seen discussions of this strange item on this group before, so I know
someone out there has one. I was considering one because I found them for
$25 each and it seems like a good deal. But I have some questions:
1) What's the frequency range?
2) Display backlight?
3) Limit search?
4) Removable antenna? If so, what style? BNC?
5) Does it have any sort of speaker built in or would one need an external?

Thanks in advance!