MAYMOC 300WIN MAG Bore Sight Laser Red Dot in-Chamber Cartridge ? Red Dot Laser Sighter ?

SPECIFICATION -- Output Power: <5 mW -- Laser Class: IIIA -- Laser Wavelength: 632 to 650 nm -- Battery Type: 2 sets of batteries -- Range for Sighting: 15 to 100 yds -- Dot Size: 2 in @100yd -- Operation: on/off end cap -- Operating Temp: F/C 14 to 122 / -10 to 50 F/C CAUTION -- Be sure that your firearm is unloaded and pointed in a safe direction before attempting to insert the boresighter. -- Do not dry-fire your firearm while the boresighter is inserted. It may cause damage to the bore sight. BATTERY INSTALLATION 1.Be certain that the batteries are all facing in the proper direction to ensure proper function of your boresighter. 2.As the bore sight doesn’t have the on/off switch, please remove the batteries after using. HOW TO ZERO YOUR FIREARM? 1.Set your firearm in a gun vise or other stable platform so that it does not move. 2.Insert your boresighter fully into the empty chamber. And sight in your firearm at any desired distance that the laser is visible (25 yards is recommended). 3.Align your firearm so that the laser is centered on the bull’s eyes. 4.Remember to remove the batteries of your bore sight to preserve the battery life, and store in a cool, dry place.