The Holosun HE407C-GR is a pistol reflex sight with valuable features such as backup solar power, shake awake technology, and 50k hours of battery life. The Holosun HE407C-GR has a 2 MOA green dot and is RMR cut. IncludedT10 L Key CR1632 Battery User Manual Lens Cloth SpecsOptical DataReticle: 2 MOA DotLight Wavelength: 540nmReticle Color: GreenParallax Free: YesUnlimited Eye Relief: YesMagnification: 1xMulti-Coatings: Yes Electronic DataPower Source: Solar & BatteryBattery Type: CR1632Battery Life (Hours): 50000Brightness Setting: 10 DL & 2 NVPhysical DataWindow Size: 0.63x0.91Dimension (in): 1.78x1.15x1.15Weight (oz): 1.5Mechanical DataHousing Material: 7075 T6 AluminumSurface Finish: AnodizedAdjustment per Click: 1 MOAW&E Travel Range: 50 MOAEnvironmental DataStorage Temperature: -40?~70?Working Temperature: -30?~60?Submersion: IP67Vibration: 5000G