Combining state-of-the-art solar cell technology with proven battery power, our brand new Volta Solar red dots feature a dual power system to keep your red dot powered at anytime, anywhere. And forget messing with reticle brightness - an innovative Eclipse Light Management System auto dims and brightens the red dot reticle based on your environment. Features: Reticle: 2 MOA dot Reticle color: Red Magnification (x): 1 Objective lens aperture (mm): 28 Eye relief (in): Unlimited Body material: Aluminum 6061-T6 / plastic IP rating: IP67 waterproof Adjustment value: 1/2 MOA Windage adjustment range: 160 MOA Elevation adjustment range: 120 MOA Dimensions (in): 3.23 x 1.37 x 1.98 Weight (oz): 7.3 Battery type: 2x AAA Battery life (high/low): 800 / 400,000