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 :Ruggedized Industrial DesignParallax-Free Optical DesignSee-Through Riser Mount12 Settings (10 Day + 2 NV)35,000 hrs with Common CR2032 BatteryRotary Illumination DialDependable IPX7 Waterproof and Fog-Proof Performance