<b>SPECIFICATION</b><br> Sighting Range:15 to 100 yards<br> Laser Wavelength: 635-655 nm<br> Laser Classs:IIIA<br> Material: Brass<br> Operation: On/Off Cap<br> Laser Type: Visible Red Laser<br> Dot Color: Red Laser<br> Battery Type: LR41/ AG3(Included 6 batteries)<br> Temperature: -10℃ to 40℃<br> <br> <b>How To Use</b><br> First: Twist the cap off the bore sight counter clockwise;<br> Second: insert batteries (+ side up) inside the rear opening.<br> Third: carefully push down and turn the screw cap clockwise to tighten the cap (the laser is now on) Finally: place in your rifle’s chamber and close the bolt.<br> <b>PACKAGE INCLUDED</b><br> 1 x 223 Rem Bore Sight<br> 6 x AG3/LR41 Batteries<br> <br>