[gpm]

That's a fascinating device.

Wouldn't putting the electronics inside a conductive case hide them from it? Maybe it's hard to get an antenna out if you do that though?

[Tostino]

The wiki said that it doesn't work against shielded electronics, however who knows how accurate that actually is. I really enjoyed the anecdote about the US embassy in Moscow having diodes embedded in the cement throughout to make finding actual bugs much harder.