Aukepate 9MM Bore Sight Red Dot Laser Boresighter for Zeroing - Includes 4 Sets of Batteries | Perfect for Pistol & Rifle Sight Alignment, Hunting & Shooting Practice

Package included -- 1 X 9mm Bore Sighter -- 6X LR41 Batteries Specification： Length: 33.8cm; Tail width: 0.86cm; Head width: 0.87cm red light Wave length (nm:) 640 to 660 LED Type: visible red la-ser Construction: Brass Sighting Range: 15 to 100 yards Operation: On/Off End Cap Temperature: -10℃ to 40℃ Battery Type:3 X LR41 (Included 6) Read more How to use the bore sight? Step1 1.Unscrew the back cap from the bore sight by turning counter clockwise 2.Stand the bore sight on a flat surface with the la-ser side pointing down Step2 1.Insert batteries (+ side up) inside the rear opening Step3 1.Carefully push down and turn the screw cap clockwise to tighten the cap (the la-ser is now on) Read more Step4 1.Place in your rifle’s chamber and close the bolt 2.To remove - open the bolt if it does not automatically extract, manually remove the unit by tilting the rifle’s barrel upward (always practicing safe firearm practices) 3.Unscrew the back and remove the batteries to turn the unit off 4.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.