It might almost be similar to a baby monitor. But instead of a microphone of sorts broadcasting from the baby's room to another room in the house, you're broadcasting a signal
(directly broadcasting, no microphone involved) to another room..or to your car, etc.
My car has a CD player but no cassette. I used the FM transmitter to broadcast a cassette I had--I set it to
88.3, hit the play button, then tuned to 88.3 on my
car stereo. Presto. (People are doing this with Ipods.)
>>broadcast a cassette I had
er, from a cass. walkman of course!
Yours is a less technical way of saying more or less the same thing I said... :)