Karl, I know what a z.o.i. Is from radar. Speaking for Henry, I know his “zone” is far reaching. 10.25 gigahertz is very hard to detect. I asked my doctor. She said, WTF? Now that pot is legal…..get away from it. Good advise. Driving behind a lot of cars now…..you could get a buzz on in no time. Stupid move legalizing it. I wonder if today’s cops can use that as probable cause to stop said vehicle since using pot while driving is illegal. I’ll ask when I see one.