Midten is a company specializing in outdoor tactical sports products and hunting accessories.</br>For many years, we constantly improve our products and innovated to redifine market standard, </br> committed to providing more products that meet your needs.Your satisfaction is our most vital aim. </br> Please feel free to contact us if there are any problem about our products, we are always here for you!</br> </br> How to use? </br> 1.Unscrew the housing from the middle, assemble the battery into it. </br> 2.Select the proper adapter that fits in the barrel of your firearm. </br> 3.Attach the adapter to the small end of the sight and put it into the barrel of your firearm. Then screw the adapter tight to maker bore sight is inserted in until it is sung with the crown of your firearm. </br> 4.When you press the switch button, a bunch of red beam will be emitted. </br> </br> Notes </br> 1. Keep boresighter's beam away from eyes. </br> 2.Before bore sighting your scope, make sure that the firearm is unloaded and the muzzle is pointed in a safe direction. </br> 3.After the firearms is bore sighted, make sure to remove the boresighter and adapter from the firearm.</br> </br> Specifications:</br> Green Laser Sight</br> Material: Premium Aluminum</br> Max Output:≤5 mw</br> Wavelength:532nw</br> Laser class: IIIA</br> </br>9x adapters of Specifications: </br>[Adapter 1]: .170 to .177 cal</br> [Adapter 2]: .220 to .25 cal</br> [Adapter 3]: .264 to .284 cal</br> [Adapter 4]: .300 to .320 cal</br> [Adapter 5]: .338 to .358 cal</br> [Adapter 6]: .375 to .410 cal</br> [Adapter 7]: .416 to .450 cal</br> [Adapter 8]: .458 to .460 cal</br> [Adapter 9]: .500 to .540 cal</br> </br>Package Includes: </br> 1x Laser Sight (Boresighter) </br> 9x adapters(with screws)</br> 1x Screwdriver</br> 2x CR2 battery</br> 1x instruction manual