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They are illegal to use in a moving vehicle (as stated by the traffic laws in) SA, NSW, ACT, NT, Queensland and Tasmania. In the state of Victoria it is an offence to sell, use or possess a radar detector, and police may confiscate such equipment if found in a vehicle.

Detection range can be as low as 100 feet or less to over a mile. A radar may track a distant large vehicle instead of a closer small vehicle without any indication to the operator which vehicle the radar is tracking. The angle between the radar or lidar and target must be small for an accurate speed mea

Generally, speeding motorists are not entitled legally to check the radar when pulled over. In case you ask the officer to show you the radar device, he/she will usually show you as a form of courtesy, or sometimes to deter any future speeding but it is not required of the officer to do so

The important metal detector features are discrimination, ground balance, target identification, operating frequency, sensitivity & search depth.

The word radar is an acronym for Radio Detection and Ranging. In simple terms, radar uses radio waves reflected off a moving object to determine its speed. Radar units generate the waves with a transmitter. When they bounce back off your car, they are picked up and amplified by a receiver so they can be analyzed.