Description Chamber the Sightmark® Laser Boresight in your .300 WSM Short Mag rifle like a regular cartridge, and a red laser dot shows exactly where you're aiming. Ideal for hunters, competitive shooters and law enforcement, this device significantly reduces wasted cartridges and shells. Simply adjust your sights or scope, and save your extra ammo for the hunt. Includes a carrying case, three (3) AG3 batteries, and instructions. Included in Package Battery Pack Carrying Case Batteries Used Type: AG5 Quantity: 2 Product Downloads Product Manual Features Precision accuracy Reliable and durable Fastest gun zeroing and sighting system Reduce wasted cartridges and shells Compact and lightweight Easy to pack and travel 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 AG5 2 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