The HS407C is an open reflex optical sight designed for pistol applications. Features include Holosun's Super LED with up to 50k hours battery life, 2MOA dot only, Solar Failsafe, and Shake Awake.Features:Reticle: 2 MOA DotLight Wavelength: 650nmReticle Color: RedParallax Free: YesUnlimited Eye Relief: YesMagnification: 1xMulti-Coatings: YesPower Source: BatteryBattery Type: CR1632Battery Life (Hours): 50000Brightness Setting: 10 DL&2 NVHousing Material: 7075 T6 AluminumSurface Finish: AnodizeAdjustment per Click: 1 MOAW&E Travel Range: A 50 MOAWindow Size: 0.63x0.91Dimension (in): 1.78x1.15x1.15Weight (oz): 1.5Storage Temperature: -40?~70?Working Temperature: -30?~60?Submersion: IP67Vibration: 5000G