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Escort is the manufacturer of the Passport brand radar detectors.

Radar Detectors

Radar detectors are completely legal to use in non-commercial vehicles in 49 states. Only Virginia and Washington D.C. currently ban radar detector use in the United States.

Radar Note:

There are over 100,000 radar guns in use in the United States. Used every day, across multiple shifts in multiple vehicles, there are potentially 100 million radar traps in the United States every year.
Radar guns operate on three bands: X band (10.525 GHz), K band (24.150 GHz) and Ka band (33.4 - 36.0 GHz). X band is becoming obsolete and almost all radar guns manufactured today operate on the newer K and Ka bands - a good radar detector must be capable of receiving these newer technologies.