The ROMEO-MSR is a sealed compact red dot or green dot sight intended for MSR, carbine, shotgun and air rifle. Brightness is adjusted with a top-mounted rotary dial, featuring 10 daytime and 2 night vision settings for quick target engagement in any condition.Features :High Performance Lens Coatings Including Dielectric Coated Prism for Excellent Light TransmissionParallax-Free Optical DesignUltra-compact Size and WeightPrecise 2 MOA Dot1.41 Sight-Height for Absolute Cowitness90 Degree Push-Button Flip-to-Side Magnifier MountRotary Illumination Control Featuring 10 Daytime and 2 NV Settings35,000 hr runtime with common CR2032 BatteryDependable IPX-7 Waterproof and Fog-Proof Performance