Viridian C5L-R Universal Red Laser Sight and Tac Light for Sub-Compact Handgun Pistols, ECR Instant On Technology with TacLoc Holster This compact Viridian green tactical laser sights utilizes a precise 532nm wave length for a more visible targeting dot in the day or night, indoors or outdoors. Class 3R Laser Product (Does not exceed Class IIIA emission limits),  5mW power output. RADIANCE TECHNOLOGY: 100 Lumens of bright light with horizontal light dispersion to better view threats across a wider area. Use the 140 Lumen strobe mode to disorient attackers. ECR INSTANT ON: Includes a robust TacLoc Instant-On ECR holster that activates the world's brightest laser and/or LED light when drawn. No fumbling with buttons in critical situations. When you draw, it's on! UNIVERSAL MOUNTING SYSTEM: The modular rail set allows for quick mounting to virtually all railed handguns. BATTERY LIFE: 20+ hours in constant laser mode, 35+ hours in laser pulsing mode, or 75 minutes tac laser and light mode.