Viridian X5L-R Red Laser Sight and Tac Light, Universal Rail Mount, ECR Instant-On, Multiple Light Modes with TacLoc Holster RED LASER: This compact Viridian red tactical laser sight utilizes a precise 635nm wave length for a more visible targeting dot in the day or night, indoors or outdoors, permitting you to track your target quicker and more accurately. The red laser sight is visible up to 1 mile at night and up to 25 yards in daylight. Class 3R Laser Product (Does not exceed Class IIIA emission limits),  5mW power output. LED LIGHTING TECHNOLOGY: 224 Lumens of bright light from a CREE LED. Spot light to blind assalients and strobe to disorient them. ECR INSTANT ON: Includes a Viridian TacLoc holster that utilizes Instant-On ECR which 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.