I tested the site. I installed parallel to my driveway per the instructions created a complete enclosure to keep it water tight. It works part of the time, when the vehicle is leaving. The alarm is loud enough to be heard at least faintly even in the basement. It is not reliable. It transmits, it's placed properly it just isn't reliable. It's past the return date so I'll shop for a more liable one and resell this one.
Works sometimes as the vehicle is leaving.