Fujitsu is supposed to come out with a 300ghz receiver, hopefully not too pricy. I can't find any other devices really yet on the market. Terahertz radios will be coming out and they will cover those frequencies. Yes, the Frey effect is a real documented phenomenon known about since the '60s. Just google the Frey Effect. The Cuba and China consulate attacks are examples of this tech being used aswell.