Description Field tested and approved by the North American Hunting Club, the Sightmark® Universal Red Laser Boresight provides the most convenient and accurate method for sighting in rifles and pistols of all types. Simply place the base of the boresight onto the end of the barrel of your weapon and it will attach magnetically. A laser dot will show exactly where your gun is aiming; it's easy to sight in any scope without fIring a single shot. Includes a carrying case, three (3) AG3 batteries, and instructions. Included in Package Battery Pack Carrying Case Limited Lifetime Warranty Batteries Used Type: AG3 Quantity: 3 Product Downloads Product Manual Features Works on all rifles and pistols More accurate than arbor type bore sights Precision accuracy Reliable and durable Fastest gun zeroing and sighting system Reduce wasted cartridges and shells Easy to pack and travel Comes with a carrying case EXPORT CONTROL NOTICE: This product is controlled for export and in-country transfer under the Export Administration Regulations (EAR). division contrary to U.S. law prohibited. Specifications Laser Wavelength 632 - 650 nm LED Type Visible red laser Output Power <5 mW Battery Type AG3 3 Battery Life 1 hour Range for Sighting 15 - 100 yds Dot Size 2 in @100yd Operation on/off end cap Material Brass Operating Temp,?F/?C 14 to 122 / -10 to 50 F/C