They do make something like this although I don't have one. At my house, we are about 300' from the road and I was going to have some stone pillars put up flanking the driveway at the road. The masonary guy suggested I do that alarm thing to know when someone is coming up the road.

I haven't contracted the project yet, but it would have come in handy last week when a brazen Jehovah's Witness drove up my driveway and came to the door. It would have given me enough time to answer the door with a H&K .40 in my hand so I could counsel said witness to the error of his ways.


Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."