Faraday cage

Only took an hour of leaning and jumping in and out of my bedroom window to put Smartblock on and off many times to get the readings from the TENMARS machine. The kids gave up and at one point I was “stuck” in the window.
Video footage not available. But many laughs were had.

So, consistent results on the internal wall. I think that’s the most FAQ. “How does it work on the inside.” ???
Dad is the senior technician and he explains how the Faraday cage (aka Smartblock) works. He says “it’s electrically impossible for the electromagnetic waves to pass through the parallel aluminium lines of the Faraday cage.”