DESC: They said it couldn’t be done, but Beltronics has produced a radar detector that is truly undetectable with the STI Driver. That’s because it’s built from magnesium which keeps the STI invisible to radar detector detectors. The Bel STi Driver features a Multiple Threat Display, which will let you know if multiple radar signals are detected at once, and their relative signal strength. The AutoScan feature of the STi Driver eliminates the need to shift between city and highway modes, and virtually eliminates false alarms. This model also supports the detection of "POP" mode radar.