Specifications:
Green Laser Sight
Material: Premium Aluminum
Laser wavelength: 630-680nm
Max. Output Power: ＜5mW
Laser Class: IIIA
Color: Green
Weight: 38g / 1.33oz
Power: CR2 Battery

How to use it?
1. Choose right size adapter for your barrel. (fit 0.177 to 0.54 Caliber)
2. Use the screwdriver to tight the screw into the adapter. Just make the size is fine to fix in your barrel.
3. And then place the laser unit in your gun muzzle.
4. When you press the switch button, a bunch of Green beam will be emitted from your gun bore.

Package Includes:
1 x Green Laser Bore Sighter
1 x Screwdriver
1 x instruction manual
2 x CR2 Batteries
9 x Bore adapters (fit 0.177 to 0.54 Caliber)

Caution:
Keep bore sight laser pointing away from your eyes.