The Streamlight Super Tac IR LED tactical flashlight has a single high power IR (Infrared) LED rated at 850 nm. Infrared light is only visible with night vision equipment. The Super Tac IR has a specially designed parabolic reflector that is optimized for a long range beam with optimum peripheral illumination. The Streamlight Super Tac IR LED flashlight runs for up to 3.5 hours on 2 ea CR123A lithium batteries. The pushbutton tail switch on the Super Tac IR can be rotated to the SAFE position to prevent accidental activation.