Theopot 9mm Green Laser Bore Sight Cal Green Dot Boresighter Rem Gauge Laser Sight with Three Sets of Batteries (3 Options)

Class IIIA laser, less than 5mW, safe and harmless. Caution: Keep the green laser beam away from eyes. Faster gun zeroing,high accuracy,reduce cartridges and shells wasted.Made to fit the 9mm chamber, caliber specific. Comes with 3 sets updated batteries (9 AG3 batteries) which can last three hours.Each set of battery can last up to 1 hour.Easy to sit perfectly in the bore,sturdy brass construction,the boresighter is high quality. The bore sight has clear and bright green laser, which can provide longer distance sighting than red laser bore sight, work well in any weather conditions. By projecting a straight green laser beam from the center , providing a precise reference for zeroing in on your target, allows for quick and accurate resetting of any sights.