From DDD's link:
Microwave lasers
Microwave lasers are called masers. Microwave guns powerful enough to injure humans are possible.
* Active Denial System is a microwave laser, to heat the water in the target's skin and thus cause incapacitating pain. Being developed by the Air...
My dad bought it for me when it just came out, the store he bought it from had it for $7.50 because they ordered the wrong version (had a scandinavian manual) and wanted to get rid of the things.
Never really played it, was too busy playing Carmageddon 1 (My dad bought that for me too, we...