Description The Viper red dotâs super low mounting height makes it the perfect solution for handguns with cutout slides. Offers the simplicity and speed advantage of a red dot, while co-witnessing with suppressor-height iron sights.Battery Life: Up to 150 hours on highest setting. Up to 30,000 hours on lower settings.PRODUCT DETAILS:Mount Type Weaver/Picatinny Magnification 1x> Dot Color Bright Red Dot Size 6 MOA Eye Relief Unlimited Adjustment Graduation 1 MOA Max Elevation Adjustment 120 MOA Max Windage Adjustment 120 MOA Parallax Setting Parallax Free Length 1.8 inches Weight 1.03 oz