LASER GENETICS™ND•3®XL SUBZERO® LASER DESIGNATOR by BSA® OPTICS•1" tube adapts to many mounting systems •Patented Rotary Optical Collimator uses (9) fully multi-colored lens that allow for full adjustment & control of beam diameter & intensity to focus light where needed most •Features: O-ring seals to keep out water dust & dirt; Nitrogen charged to prevent lens form fogging; Quick adjustable beam (Rotary Optical Beam Collimator) diameter & intensity •Precision machined from high tech aluminum alloy •Anodized matte black finish •Includes ND3®XL Subzero® Laser Designator momentary pressure switch carrying case scope mount (1" tube) w/W&E adjustments binocular/spotting scope mount dual-size Weaver-style mount (3/8" & 5/8") & (2) Lithium CR123A battery •Wavelength: 531nm (green) •Range: 3 miles •Battery Life: Up to 10 hours (up to 4 hours at 0°F) •Output Power: 18mW •Dimensions: 8"L x 1.25"Dia. •Wt.: 5.37 oz. •FDA Safety Class: Class 2M •1-Year Warranty Lens 26mm