Tested and recommended by the National Tactical officers Association, the Sightmark boresight offers a quick and easy way to sight in your .40 Smith & Wesson pistol. The bore sight can be used as a training aid for "quick draw" drills. Includes a carrying case, three AG3 batteries and instructions.Specifications and Features:Batteries Included: YesBattery Type: AG3Battery: AG5Cartridge: 40 S&WFinish: BrassLaser Color: RedLaser Range: 300 FeetOutput: 5MW