[@Genni]

Anya can replicate it with enough materials. Since its not an overly complex device, it doesn't require that much in terms of raw materials. And with enough understanding (aka, if someone gets their hands in one of those and reverse engineer it) they can replicate it as well.

The thing is that it is only useful to those with the same augment as Anya. To everyone else, it only works as a sub-optimal, localized signal repeater.

PS: added another small drawback to the Third Eye, and now it has only 15m range.

Considering making the low hum audible to everyone if one pays enough attention, so the device is easier to find (well... they'll know that its something strange the second they see it... lol)