Radar detectors are similar to radio receivers that are in your car or home. Radio receivers pick up signals in AM and FM frequencies. Radar detectors find the frequencies that are used by police officials using radar guns. Once the radar detector finds a frequency being directed at your car, it signals the driver somehow, most likely by beeping. It is a simple technology. Although, as law enforcement agencies expand the frequencies to detect speed, companies need to produce more radar detectors
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