LuDing Bore Sight- 223 Laser Bore Sight Cal Red Dot Laser Boresighter 223 5.56mm Rem Gauge with 2 Sets of Batteries

HOW TO USE THE BORE SIGHT? 1.Remove the back cover (turn it counterclockwise). 2.Insert 3 batteries into the back cover(+ side up). 3.Close the back cover and the laser is turned on (rotate the back cover clockwise). 4.Turn off the device (release the back cover and remove the battery). SPECIFICATION Wavelength: 635-655 nm Material: Brass Operation: On/off cap Type: Visible Red Laser Dot Color: Red Battery: LR41 Product Weight: 35g PACKAGE INCLUDED 1PC: 1 x 223 Rem Bore Sight 1PC: 6 x AG3/LR41 Batteries