Sig Sauer ROMEO5 compact red dot sights Tread logo provide civilians and armed professionals a robust 1x aiming solution for any situation. Ultra-low parallax so point-of-aim is point-of-impact and the red dot remains parallel to the bore of your firearm, no matter what your viewing angle is relative to the optical axis of the sight. Unlimited eye-relief allows you to acquire the aiming point and the target regardless of the position of your eye behind the sight. The readily available CR2032 battery is side-loading, allowing for quick battery replacement (featuring 50,000+ hours or more of life).Features:2 MOA Red-Dot provides 10 illumination settings (8 daylight plus 2 NV) for visibility in all light conditionsMOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced 50,000+ hour battery lifeIntegrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of applicationsDependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof performanceIncludes a M1913 Picatinny low mount riser and a co-witness 1.41"" riser mountSpecifications:Magnification: 1x Objective ClearAperture: 20 mmEye Relief: UnlimitedIllumination Settings: 8 Daytime / 2 NVElevation Adjustment Range: +/- 40 MOAWindage Adjustment Range: +/- 40 MOAReticle: 2 MOARed Dot Adjustment increments: 0.5 MOABattery: 1x Energizer CR2032 Battery is Included