Bore Sight 9mm Green Laser Boresighter with 12 Batteries 

• Class IIIA laser, less than 5mW, safe and harmless. Caution: Keep the green laser beam away from eyes.
• The 9mm green laser bore sight is made to fit the 9mm chamber, caliber specific. Sturdy and durable brass construction, it is not easy to deform under high and low temperature environments, which can ensure the accuracy of the bore sighter.
• Bright and clear green laser, the sighting rang is 3 times that of the red laser boresigter at night, so this 9mm green bore sighter is a good choice for keeping a focus on outdoor work.
• The 9mm bore sight allows you to align with your optics with a few minutes, save your time and cartridges and shells. Sighting range of the bore sight is 15 to 100 yards.
• The 9mm laser bore sight includes 4 sets batteries (12 batteries), which can last 2 hours and 20 minutes in total ( each set of battery can last up to 35 minutes). Note: When the battery power is about to run out, the laser will keep flashing and then dim, please replace with the new battery at this time.