I have the battery operated escort solo I think it's called. Used it a few times but wasn't really sure it was useful. Then I was stuck in a construction back up near Baker CA on the 15. Going 5 miles an hour for at least 10 minutes. Detector started going crazy when I was 3 car lengths from a parked cop. Obviously the radar had been on the whole time, and I had been in line a long time, but it did not pick it up until that close. Maybe it was laser that was blocked by other cars? I don't know but that was the last time I used it.