This 9mm Cartridge Laser Bore Sighter features precision accuracy. This bore sighter is a fast， reliable and durable gun zeroing and sighting system.Description:-Material: High Quality Brass-LED Type: Visible Red laser sight .-It projects a straight laser beam allowing precise optical adjustmentsto sight in your scopes & sights without firing and ammo.-Great for the range and ensuring your gun is still zeroed in after travel.-Easy to use .-Simply place batteries in end cap-twist and end cap to turn on-and place in chamber.-The laser unit cartridge fits CAL: 9mm caliber-Laser wavelength (nm): 635-655-Laser output less than <5mW.-Battery type: LR41-Battery life: 20minutes-Range for sighting: 15-100 yards-Operation: On/off end cap-Construction: BrassPackage included:1 x Laser Boresighter2 x Batteries1 x User Manual