Standard Red Laser Pointer

specifications FDA Safety Class IIIa Model: LS11 Wavelength 645 nm Power Output<5 mW Range 2000 ft Beam Diameter At Source1.1 mm Output Variance 10% after 20 min Beam Divergence 1.0 mRad Operating Lifetime 2000 hours Dimensions 5.25 in. long, 0.44 in.