The Z68 tailcap switch offers both momentary and constant activation - press for momentary Scout Light or flashlight operation, press further to "click" the light into constant-on mode, and click again to turn it off. The raised guard around the push-button acts as a first line of defense against accidental activation during operations or when carrying the light in a pocket or holster. A lock-out feature effectively prevents activation during tactical use, transportation, or storage. RSR -