Feature RDSL36 VictOptics SRD 1x23x33 Four-Reticle A Versatile Targeting: 4 Reticle Options Including 3.5 MOA Dot, Crosshair, and Circle Adapt to Various Shooting Scenarios A Wide Field of View: Large 23x33mm Window Provides a Clear and Expansive Sight Picture for Faster Target Acquisition A Adaptable Brightness: 6 Levels with Red and Green Dot Options Suit Different Lighting Conditions A Easy Battery Replacement: Side-Loading Tray Allows Quick Swap Without Losing Zero A Rapid Mounting: Quick Release Picatinny System Enables Fast, Tool-Free Installation for Maximum Convenience Specification RDSL36 VictOptics SRD 1x23x33 Four-Reticle Specification Details Magnification: N/A Window Lens Size: 23x;33 mm Parallax: Free (