Hello, I'm planning on getting a radar detector probably V1. I never had one before so I was just wondering about a few things. I know it will help alot on highway when I'm on my way to work, but will it work in the city(suburbs?). Also the one thing im confused on, do LEOs actualy have to use a radar gun for the detector to go of, or do they have them built into their cars, or what? Thanks for any advice you can give.