No idea where it was manufactured, Society. Point is, these "detectors" were taken apart, back in 2010 - I have included a link to a Newsmight piece where Sidney Alford, an explosives consultant to the military did just that, and showed it for what it was - bent bits of car antennae in a black plastic box, together with a card that had a kind of pre-printed circuit on it- a circuit that did nothing at all. No power source to the device, nothing at all.
It was all "quantum interference" and "digital signatures" and whatever other sciencey phrase de jour they could cobble together to explain how it allegedly worked.The claims made for these devices were incredible, staggering and beyond belief - which in itself should have been a clue..
http://news.bbc.co.uk/1/hi/8471187.stm