Having a driveway alarm at the end of your driveway is a great way to know if someone is coming to your house. If UPS is delivering a package and you are in the basement, you won't miss that delivery. If your house is a good way off the street, and someone drives up your driveway in the middle of the night, they will never know that you were informed.
Here is a hard wired driveway alarm probe. You need a trench from your house to the end of the driveway to bury the wire. Just bury the probe a couple inches deep at the side of the driveway. Or just place it in, or behind a bush.
It takes something metal going next to it before it will set off the chime in your house. A car, 4 wheeler, bicycle, something metal. It won't be set off by a deer, other anamils, or people.
Here is a picture of the chime units. They have adjustable volume control and you can add as many as you need in your home. Upstairs, middle floor and basement are some examples.
