WHISTLER XTR-145 Radar/Laser Detector #XTR145 Whistler has been the unequiled leader in radar detectors longer then I can remember, the XTR-145 Radar / Laser Detector features total 360-degree band protection in a small, convenient unit that mounts to your windshield. This laser detector monitors X, K, Ka, and SuperWide bands - in other words, it covers all bands used by police radar, including "Stalker" style radar guns.