Feyachi Bore Sight 9MM/223 5.56/12GA Red Dot Laser Zeroing Bore Sighter Pistol Laser Boresighter with 3 Sets

Feyachi Bore Sight 9MM Red Dot Rifle Boresighter Features 1. Made to fit the 9mm chamber, caliber specific. 2. Each set batteries lasts up to an hour. 3. Easy to use, fast gun zeroing and sighting and reduce wasted cartridges and shells. 4.Sturdy brass construction. Easy to sit perfectly in the bore. Specifications - Output Power: <5 mW - Laser Class: IIIA - Laser Wavelength: 632 to 650 nm - Battery Type: AG3/LR41 - Range for Sighting: 15 to 100 yds - Dot Size: 2 in @100yd - Operation: on/off end cap - Operating Temp: F/C 14 to 122 / -10 to 50 F/C Prompt As the bore sight doesn’t have the on/off switch, please remove the batteries after using.User Manual1.Open the product box and remove the calibrator and power source. 2.Tear open the power source packaging, then unscrew the cover at the base of the calibrator. 3.Insert the three power source units into the calibrator one by one, then screw the cover back on. A red dot will appear at this point. (Do not point the red dot at your eyes to avoid injury.) 4.Insert the calibrator into the device, aim it at a target 50 yards or more away, and you will be able to see the specific position displayed by the red dot. 5.Adjust the red dot so that it aligns with the center of the target. Once aligned, you can remove the calibrator. 6.After calibration is complete, remove the power source and store it in the box for easy use next time.