Okay who can build me one of these?

The speaker in the video was extremely difficult for me to understand but the idea seems quite clever.

What I'm most surprised about is just how well it actually works... I did not think such EM fluctuations would be usably detectable from several meters away... but I suppose this may be moreso due to improper/lack of shielding in the first place, which I would think should be easily fixable in most products to mitigate this type of detection.