Spectre IV RDD, Spectre 4 RADAR DETECTOR DETECTOR VG radar detector detector Spectre IV can't detect the Passport 9500ci remote radar detector Spectre IV can't detect the Escort Passport Redline radar detector Spectre IV closeup view. The Spectre 4 attaches to the windshield using suction cups. But it can't detect the Bel STi Driver or the Bel STi-R Remote radar detectors.

The new Spectre IV and IV+ radar detector detectors (RDD) have improved local oscillator detection sensitivity, which enables police to detect noisy radar detectors at greater distances. The Spectre IV+ has a unique control allowing the operator to better locate radar detectors in commercial vehicles in states and provinces where radar detectors are legal for private vehicles. Spectre iv and Spectre iii, VG4 is used in USA and Europe. VG2 is used in the USA, Stalcar is used in AU and NZ, while OPP Spectre is used in Canada. All of these RDD devices are designed to detect your radar detector by sensing the local oscillator frequency of the radar detector, but certain radar detectors are undetectable to RDD. The Bel STi Driver and Escort Redline are totally invisible to all Spectre, Stalcar, OPP, VG2 and VG4. The Passport 9500ci radar laser jammer is also 100% invisible to all of these RDD tools.

The Bel STi-R (used in USA, Canada and also in Europe for narrowband Ka photo radar), Passport 9500ci (used in US and Canada), Bel STi Driver (USA and Canada) and Escort Redline (USA and Canada) radar detectors can not be detected by any RDD including, but not limited to Spectre iv, Spectre Iv+, Spectre iii, Spectre ii, VG2, VG4, STalcar RDD used in AU, RCMP and OPP Spectre RDD in Canada.

The Spectre IV and IV+ locate radar detectors by detecting the electromagnetic (RF) "leakage" from the local oscillator frequency of the radar detector. Some manufacturers try to screen out the leakage with shielding; others try to adjust the leakage to a frequency that the Spectre isn't sensitive to. So far, most radar detector manufacturers have failed and their products are easily detected by the Spectre IV; except for the Beltronics STi Driver, Bel STi-R hidden radar detector and the Passport 9500ci remote radar detector.

Spectre 4 RDD (including Spectre iii, ii, VG2, VG4, Stalcar RDD and OPP Spectre in Canada) is quite effective at detecting nearly all other radar detectors including Valentine One, Valentine One Euro, many of the Bel and Escort radar detectors, Cobra and Whistler radar detectors.However, the above 4 radar detectors can not be detected by any RDD.