Developed to improve precision and accuracy with any style or caliber of weapon, the Trijicon RMR (Ruggedized Miniature Reflex) is designed to be as durable as the legendary ACOG. The RM01 is an LED sight powered by a standard CR2032 battery. Housed in rugged forged aluminum, the RMR is extremely tough yet lightweight. New easy-to-use adjusters with audible clicks allow for quick windage and elevation adjustments. The new Trijicon RMR is tougher than any alternative and suitable for military, law enforcement and hunting applications.SPECSMagnification:1xBullet Drop Compensator:NoLength (in):45mmWeight (oz):1.2 oz w/ BatteryIllumination Source:LEDReticle Pattern:3.25 MOA DotDay Reticle Color:RedNight Reticle Color:RedAdjustment @ 100 yards (clicks/in):1Housing Material:Forged AluminumBatteries:1 CR2032 Lithium BatteryBattery Life:Up to 2 years of typical use∗, up to 5 years in dark storage. ∗When used at 70F (21C). Extreme temperatures (high or low) will affect lithium battery performance.