<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br><div><blockquote type="cite"><div><div><blockquote type="cite">a better footage you of the Camero Xaver LR80 possibilities you can watch here:<br><br>https://www.youtube.com/watch?v=dRicOS5CoLw<br><br>Roland<br><br></blockquote>A device that shines enough energy to illuminate through a wall should not be too hard to detect. As Peter said, that's not a problem if we are trying to locate people in burning building. But if a company sells that as a magic weapon, I expect another company to sell the alarm device, so whoever is attacked gets an early warning.<br></div></div></blockquote></div>Meh. WiFi routers provide this kind of functionality - you're installing the "bug" yourself, or if you aren't, your neighbors may be doing it for you. There's a whole bunch of research on this - the technique was shown to work at least 6 years ago but it keeps getting better as more powerful ML gets applied to understanding the signals. One example paper: <a href="https://www.ri.cmu.edu/app/uploads/2019/09/Person_in_WiFi_ICCV2019.pdf">https://www.ri.cmu.edu/app/uploads/2019/09/Person_in_WiFi_ICCV2019.pdf</a><div><br><div><br></div><div><div> -- Jerry</div></div><div><br></div></div></body></html>