The brand new Viridian E-Series laser for the Glock 19 and Glock 23 is a new line of trigger guard mounted laser sights that boast the maximum intensity red laser allowed by the US government. Utilizing years of R&D experience developing the successful Viridian Reactor line of trigger guard mounted laser sights, each E-Series model is engineered to perfectly fit a specific firearm. Laser Features Laser Intensity: 5mW peak 650nm red laser Laser Range: Effective up to 25 yards in daylight/1 mile at night Laser Adjustment: Factory preset with easy windage & elevation adjustments Auto Shut-Off: Unit shuts off after 5 minutes to conserve battery Battery: 6+ hours of constant laser with one (1) 1/3N battery Activation: Ambidextrous on/off switch