Keep in mind, in standard military fashion, this is probably the highest declassified setting. It can probably turn you into a microwave burrito in a second if they turn it up all the way...
Pfft. My dad invented this. He was in the army on radios/microwaves/missiles during the Cuban crisis. One day he pointed his microwave transmitter at a dude down the beach (just for a second). His CO yelled at him, but I suspect the incident began some real research.