Sightmark Laser Boresighter. Laser dot size at 100 yds. is 2". Includes LR41 button-style batteries, for approx. 1 hour of continuous run time. State Caliber. Get yours today! Please Note: May take 2 or 3 batteries according to model of boresighter. Batteries included. WARNING: You must be 18 or older to purchase Lasers. Lasers cannot be shipped to New York City; D.C.; MA; Canada or Puerto Rico. Lasers cannot be shipped Parcel Post. Please check your State, County and City laws for restrictions before ordering Lasers. Sightmark Laser Boresighter