but if it's set to filter it losses a ton of sensitivity (according to the tests)
to filter out the unwanted the system lowers sensitivity (that is how all radar detectors work, city mode is just low sensitivity) I can only say in tests that the v1 did not perform as well as others (it failed against my bel remote mount in my car)
That is how cheaper radars work but any good known it uses logistics to weed out the false alarms from the real ones