What is a Radar Detector?
A radar detector is a device that scans for police radar signals and then alerts you to their presence. Radar guns actually send out radio waves, on specific frequencies that are prescribed by the FCC. These radar/radio signals are referred to as X band, K band, Ka band, and Ku band. (The Ku band is used only in European countries.) Because radar signals propagate in a wave that gets larger as it moves outward, and because they bounce off of other objects, they can often be detected from over a mile away, giving you ample time to adjust your speed.