In article , Karl
Hemilton says...

My wife and I have two cars. While traveling, most of the time we go
in two cars. I am looking a device that we can talk to each other
while driving. Some thing like a FM Transmitter.

You have a number of options.

(1) FRS radios. Small, cheap, easily strong enough to go at least
a half-mile, no license required. Obtainable at most electronic and
office-supply stores.

(2) You and your wife could get amateur radio licenses, and use 2m
or 70cm rigs on a simplex channel. You can switch to a repeater if you
get separated. Requires study, a license exam, etc. You are also
restricted from passing commercial messages ("Buy product X at store
Y," etc.) by Part 97 regs.

(3) Get a pair of MURS radios. More powerful than FRS, same no-
license-required, can go a little further, but considerably more
expensive than FRS units.

Good hunting.


--
Dr. Anton Squeegee, Director, Dutch Surrealist Plumbing Institute
(Known to some as Bruce Lane, KC7GR)
kyrrin a/t bluefeathertech d-o=t c&o&m
"Quando Omni Flunkus Moritati" (Red Green)