The main Profiteers and proponents of these largely Useless car countermeasure systems seem to be the well known 'Cowboy' Radar Roy and his friend or close Relation 'slylooker' Vortex vortexradar.com but they are not alone of course. They are an Interesting item to have, but never pay much, without a Laser or Radar Jammer are alone patently Useless.. Dave UK. My Website www.radar-laser-jammers.net