The LaserLyte LT-PRO Laser Training System will save you money on ammunition and gas spent driving to and from your local range. This unique system is designed to fit all handguns from 9mm to 45 caliber that have at least a 2" barrel. The laser system can be used practically anywhere. It simply shoots the laser downrange and shows you immediately where it hits. The laser is sound activated and will flash momentarily when you dry-fire your firearm. Included in the Laser Training System are 3 batteries (377 Silver Oxide), the laser, an adjustable adapter for different calibers and instructions for use.