4 ms·
It's an RF field strength meter. I watched about a half minute of the video then shut it off.
by throwaway81523 9mo ago
It's an RF field strength meter. I watched about a half minute of the video then shut it off.
- Brian_K_White 9mo agoThey are also near-IR lights with special filter viewing glass that produces a visible reflection from the camera optics. If the camera can see you, you can see the flashing even if it's a pinpoint hidden recessed in a shadow behind a crack. The good ones anyway.