I agree with this article from Karl Muller, a highly educated, experienced and practical scientist; that a couple of watts of microwave held next to the head is an absolute NO-NO….
I’m lucky, I do not have to use such a device. I bought one two decades ago to pick up / develop work with a new factory I was supplying but that soon fizzled out, fickle engineer that was clueless, couldn’t spot a good man when he saw one. Never mind, thank goodness I do not have to cope with intrusive unwanted phone calls.
View story at Medium.com