Viridian X5L Green Laser Sight and Tac Light, Universal Rail Mount, ECR Instant-On, Multiple Light Modes VIRIDIAN GREEN LASER: This compact green tactical laser utilizes a precise 532nm wave length for a more visible targeting dot in day or night, indoors or outdoors. Class 3R Laser Product (Does not exceed Class IIIA emission limits),  5mW power output LED LIGHT: 178 Lumens of bright light with horizontal light dispersion to better view threats across a wider area. Use the 224 Lumen strobe mode to disorient attackers. EASY ACTIVATION: Easily activate the world's brightest laser and/or LED light when drawn. No fumbling with buttons in critical situations. BATTERY LIFE: 6+ hours constant laser, 10+ hours of pulsing laser runtime, 60 minutes tac laser and light. Includes one CR123A 3v lithium. UNIVERSAL MOUNTING SYSTEM: The modular rail set allows for quick mounting to virtually all railed handguns and rifles