Green laser Power Output <1mW Metal case Length: 5.85" Diameter: 0.54" Wavelength: 532 nm Range: 6,000 ft in darkness Beam Diameter: 1.1 mm Output Variance 10% after 20 min Beam Divergence: 1.0 mRad Operating Lifetime 3000 - 5000 hours FDA Safety Class: IIIA Batteries: 2x AAA (included) Shipping Weight: 0.5 lbs Imported onPoint Laser Model: ECO-GN1-B