The device fires a 1 mm radio wave, which penetrates the top 1/64th of an inch of skin and just down to the nerve endings. When hit, the target moves away from the beam and the sensation ceases. The sensation at the target is akin to taking a heat blast from an opened “oven door,” according to Marine Corps. Col. Kirk Hymes. In most cases there is no permanent injury.
For more, go to: http://www.designnews.com/article/12709-Military_s_Active_Denial_System_is_First_True_Ray_Gun.php
