This article is dated and the models cited are quite old. Many of the high-end modern radar detectors are invisible to Radar Detector Detectors (RDDs) like the Spectre and VG2. The Escort Redline 360C, Radenso DS1, Radenso Pro M, Radenso XP, Uniden R7, and Valentine V1G2 models remain invisible to both the Spectre Elite and Spectre III. Oddly enough, the newer Spectre Elite is less sensitive than the older Spectre III and will often miss emissions from the Uniden R1 and R3 detectors. Do your research before you assume a Radar Detector is invisible to RDDs.