The mepro m22 pro features a factory-installed light module that eliminates reticle washout and enhances low-light performance.With cutting-edge fiber-optic illumination for daylight visibility and tritium vials for nighttime clarity.Meprolight engineers designed a battery powered mechanism to enhance the reticle in extremely lowlight.The single cr2032 battery provides over 50,000 hours of use.The auto-adjuster reacts to ambient light to maintain a crisp reticle in the worst conditions.The transition between fiber-optic and tritium systems is instantaneous and automatic.Its reliable in all weather conditions and compatible with night vision devices (nvds) and magnifiers for added versatility.Battery Size: CR2032Weight: 9.20 ozReticle: 10 MOA Red TriangleAdjustment Size: 1 MOAProofs: Fog Proof/Shockproof/Waterproof