4.18" overall. Clip. Impact resistant. Water resistant. Features white light (250 lumens, 1.5h runtime) and Yellow/Green (39 lumens, 12h runtime) LEDs. 140m beam distance. Weatherproof, O-ring sealed. On the fly bezel switching between white and color mode with no filter required. Requires (1) CR123A battery (not included). Aluminum construction. 

SUREFIRE Aviator Yellow/Green Flashlight