What is RDD?
RDD, or Radar detector detector is a device which detecting radar detectors. While radar detector is scanning radar bands, oscillators inside of the radar detector are emitting radiation which RDD can detect. More info at: Wikipedia - Radar detector detector
Where RDD is used?
In Europe. RDD are used in:
Which GENEVO radar detectors are immnune to RDD? (updated: 2020/01/23)
Portable Radar Detectors
GENEVO MAX comes with the most powerful 360° radar antenna among our portable radar detectors, a completely redesigned laser sensor with military laser reflector sight technology and new GPS antenna with database of the entire Europe. No surprises will be waiting for you on the road.