Viridian Reactor 5 Gen 1 - Red Laser Sight Pistol Handgun, Tactical Red Laser, ECR Instant On Technology Holster LASER RANGE: The red dot laser is visible up to 1 miles at night and up to 25 yards in daylight. This laser is powered to the maximum legal strength. RED LASER: This compact red tactical laser sight utilizes a precise advanced 635nm wave length to generate the brightest, sharpest and visible red targeting dot. Track your target quicker and more accurately. Class 3R Laser Product (Does not exceed Class IIIA emission limits),  5mW power output ECR INSTANT ON: Includes a sleek Instant-On ECR holster that activates the world's most visible red dot laser when drawn. No fumbling with buttons in critical situations. When you draw, it's on! CONSTRUCTION: Built specifically for the Glock 43 from high strength thermo molded polymer, this tactical red laser is only .78 oz. including the battery! Virtually Weightless! BATTERY LIFE: Up to 12 hours of constant red laser time. Includes a dual color low battery indicator.