Hunting Tactical CAL 7.62 x 39 Brass Boresighter Cartridge Red Laser Bore Sight Main Features‎:‎ Easy and convenient to use with the high accuracy of bore sighting system Dead accurate sighting and zeroing your scope at 100 yards‎.‎ Sits perfectly in the chamber Durable solid brass construction Suitable for fast aiming and shooting at stationary and moving objects Powered by 3 x button batteries ‎(‎ not included ‎)‎ Maximum output power‎:‎ Less than 5mW Wavelength‎:‎ 635‎-655nm Note‎:‎ 1‎.‎ Do not look in the laser beam directly‎,‎ or your eyes will be hurt 2‎.‎ Never point a laser beam at a person 3‎.‎ Don't aim the laser at reflective surfaces 4‎.‎ Never view a laser pointer using an optical instrument‎,‎ such as binocular or a microscope 5‎.‎ Do not allow children to use laser pointers‎,‎ unless under the supervision of an adult   Laser Wavelength‎(‎nm‎)‎‎:‎ 635‎-655nm Laser Power‎:‎ Less than 5mW Material‎:‎ Brass Product weight‎:‎ 0.0060 kg Package weight‎:‎ 0.0320 kg Product size ‎(‎L x W x H‎)‎‎:‎ 3.80 x 1.10 x 1.10 cm / 1.5 x 0.43 x 0.43 inches Package size ‎(‎L x W x H‎)‎‎:‎ 4.00 x 5.00 x 1.50 cm / 1.57 x 1.97 x 0.59 inches Package Contents‎:‎ 1 x Hunting Tactical CAL 7.62 x 39 Brass Boresighter Cartridge Red Laser Bore Sight‎,‎ 1 x English User Manual