The Detector Finder from Dealer Marketing is a pocket-sized microwave/laser emitter designed to assist law enforcement in locating radar detectors used in commercial vehicles, which, under a U.S. DOT directive, is illegal in all states. Using a nine-volt battery, the device emits powered transmissions of less than five milliwatts when an operator presses individual X, K, and Ka band buttons. The Detector Finder comes with a 90-day limited warranty.