Specifications:
Material: Aluminum Alloy.
Light Color: Red-type; Green-type
Length: Red 6.5" ; Green 7”
Big end Diameter: 0.8".
Small end Diameter: 0.169".
Max. Output Power: ≤ 4.9mW.
Class: IIIA.
Wavelength: Red: 630nm; Green: 532nm.
Batteries type: CR2 800mAh.

Adapters of Specifications:
[Adapter #1].17 to .18 Cal.
[Adapter #2].22 to .243 Cal.
[Adapter #3].235 to .27 Cal.
[Adapter #4].27 to .315 Cal.
[Adapter #5].30 to .36 Cal.
[Adapter #6].335 to .40 Cal.
[Adapter #7].37 to .45 Cal.
[Adapter #8].43 to .50 Cal.
[Adapter #9].47 to .55 Cal.
[Adapter #10].535 to .61 Cal.
[Adapter #11].57 to .64 Cal.
[Adapter #12].69 to .78 Cal.

How to use the Bore Sighter?
1. Install the battery into the boresighter.
2. Select the proper adapter to fit in the barrel of your firearm.
3. Install the adapter on the small end of the boresighting tool.
4. Gently push the small end of the bore sighter with the adapter into the barrel of your firearm. Make sure the boresight tool is inserted deeply enough until it is snug with the opening of your firearm barrel.
5. When you turn the light on, a small Red/Green dot will be emitted. And then you can adjust your scope's windage and elevation so that your cross hair aligns with the red/green dot.

Package Includes:
1 x Bore sight
12 x Adapters (Fit Calibers from .17 to 12ga)
2 x CR2 800mAh Battery
1 x Screwdriver
1 x Instructions
Warning:
Keep red/green dot beam away from eyes.
Before boresighting your scope, make sure that the firearm is unloaded and the muzzle is pointed in a safe direction.
After the sight is adjusted, make sure to remove the sight tool and adapter from the firearm.