The HE512T Enclosed Reflex Sight has a Titanium housing, wide field of view and our new tool-less battery compartment. This reflex red dot optic equipped with our Multi-Reticle System (MRS) that includes three reticle choices. A 65 MOA circle dot reticle with the option of switching to a 2MOA dot only and for quick target acquisition, a 65 MOA circle only. Our highly efficient light emitting diodes and solar panels allow Holosun solar optics to run without a battery in many lighting conditions. Additionally, the battery lasts up to 5-years on the dot and up to 2 years on the circle dot. This optic was designed to take anything you and your environment can throw at it and give you back the innovations you need to finish any job.Specifications:Light Source: LEDReticle: 2MOA Dot & 64MOA RingParallax Free: YesUnlimited Eye Relief: YesMagnification: 1xMulti-Coatings: YesIntegrated Laser: NoBattery Type: CR2032Battery Life: Up to 50,000 HoursBrightness Setting: 10 Daylight & 2 NV CompatibleHousing Material: TitaniumSurface Finish: Housing Color: BlackAdjustment per Click: 0.5 MOAW&E Travel Range: 50 MOAStorage Temperature: -40? - 158?Working Temperature: -40? - 140?Submersion: IPX8Vibration: Up to 1000GWindow Size: 0.91 x 1.26Dimension (in): 3.35 x 1.63 x 1.7Weight (oz): 6.77Central Height (in): 1.41