What About
Can cops tell if you have a radar jammer?
While radar detectors can be legally owned and used privately in California, radar jammers are completely prohibited. This stance is echoed by several other states and also by federal law. ... A cop will know if a radar jammer is being used even if they can't actually track your exact speed.
What happens if you get caught with a radar jammer?
It's bad news to get caught on an interstate highway with a radar jammer. ... Using a radar jammer is a federal offense that can result in a $50,000 fine and/or five years in prison. Radar jammers are also illegal in some states meaning you could be subject to punishment even if you aren't using it on a federal road.