Operation:- Optics: Transmission holography - parallax free- Magnification: 1x - Eye Relief: Unlimited- Length/Width/Height: 3.5-Inch by 2.4-Inch by 2.8-Inch (91.4X 60.9x71mm)- Weight: 11.2 oz. (317grams)- Temperature: -40 to 150 F - Waterproof: Submersible to 10 ft depth- Sealing: Fog proof internal optics- Color/Finish: Non reflective black with hard coat finish- Adjustment (per click): 0.5 MOA (1/2-Inch at 100 yds.)- Adjustment Range: +/- 40 MOA travel- Mount: 1-Inch Weaver or (MIL-STD-1913) rail. Adjustable for width variation - Return to Zero: Repeatable to within 2 MOA after re-mounting Heads-Up-Display Window:- Optical Surfaces: Anti-glare coating- Window Dimensions: 1.20-Inch x 0.85-Inch (30 x 23mm)- Front Window Material: 1/8-Inch solid glass- Rear Window Material: Shatter resistant laminate (3/16-Inch thick)- Field of View (100 yds.): 30 yds. (28m) at a 4-Inch eye relief Electrical:- Brightness Adjustment Range: 146,000:1 brightest to lowest- Power Source: (1) 123 lithium battery- Battery Life: 600 continuous hours at nominal setting 12- Brightness Settings: 20 settings with scrolling feature - Auto Battery Check Indicator: Flashing reticle upon start-up- Auto Shut-down: At 8 hrs.- programmable to 4 hrs.