Specification: Color: Gold Battery type: LR41(Batteries included.) How to use the bore sight? 1.Unscrew the back cap from the bore sight by turning counter clockwise 2.Stand the bore sight on a flat surface with the laser side pointing down 3.Insert batteries ( side up) inside the rear opening 4.Carefully push down and turn the screw cap clockwise to tighten the cap (the laser is now on) 7.Unscrew the back and remove the batteries to turn the unit off Package included -- 1 X 308 Bore Sight -- 6 X LR41 Batteries