DescriptionRadar detector manufacturers are constantly playing a game of catch-up with new technologies designed to nab the lead-footed. Pop radar is a relatively new instant-on technology that may make a whole generation of radar detectors obsolete. These radar guns operate at low frequency until they are switched on to determine a drivers speed with lightning-fast accuracy. This leaves a radar detector little opportunity to scan and detect the radar signal. Pop radar may sound ominous, but a new crop of radar detectors--including the Escort Passport 8500 X50 offer Pop radar detection. Escort claims that the 8500 X50 is the most powerful and advanced radar detector ever, with the supreme sensitivity required to detect low-frequency Pop radar.Real time price comparison from PriceGrabber