The Viridian E-Series Green Laser Sight was created for everyday conceal and carry owners. The model specific, trigger guard mounted, laser sight offers a powerful green laser, delivering rapid target acquisition when you need it most. The E-Series is available in a variety of gun models. Viridian E-Series Green Laser Sight Features. Easy installation onto the trigger guard of your pistol. Ambidextrous on/off button with 5 min auto shut off. Up to 100 yard range in daylight and 2 miles at night. Constant laser with +60 min battery life. Easy windage and elevation adjustment. Life (constant): 6 Hours. Material: High Strength Thermo Molded Polymer. Up to 100 yards daylight / 2 miles night.