http://www.lazygranch.com/sound/icantsaywhere.wav

I rather not say where this dector is located, and if you recognize it,
please don't post where it can be found.

The detector goes off where the guard makes the rounds (smart thinking,
huh!). The sound is a bit funny because the guard is doubling with the
RF from the sensor., er because the guard spotted someone.....

So rather than using fancy digital encoding, the alarm installer simply
records a name for the alarm. The big assumption here is the average
schmuck scoping out the facility doesn't own a scanner, and if he does,
he doesn't know your secret unlicensed frequency.

Remember, when you assume, you make an ass out of Uma Thurman.