Operation • Optics: Transmission holography - parallax free • Magnification: 1x • Eye Relief: Unlimited • Length/Width/Height: 5.4"x1.8"x2.25" (137x49x60 mm) • Weight: 10.9 oz (309 grams) • Temperature: -40 to 150 F (using AA lithiums); -20 to 140 F (all other battery choices) • Waterproof: Submersible to 10 ft depth • Sealing: Fogproof internal optics • Adjustment (per click): 0.5 MOA (1/2" at 100 yds) • Adjustment Range: +/- 40 MOA travel • Mount: 1" Picatinny (MIL-STD-1913) or Weaver rail • Return to Zero: Repeatable to 1 MOA after re-mounting Heads-Up-Display Window • Optical Surfaces: Anti-glare coating • Window Dimensions: 1.20" x 0.85" (30 x 23mm) • Front Window Material: 1/8" solid glass • Rear Window Material: Shatter resistant laminate (3/16" thick) • Field of View (100 yds): 30 yds (28m) at a 4" eye relief Electrical • Brightness Adjustment Range: 110,000:1 brightest to lowest • Night Vision Compatibility • Power Source: 2x 1.5V AA batteries (supports lithium, alkaline, or rechargeable) • Battery Life: 1,000 continuous hours (lithium) at nominal setting 12; 600 continuous with AA-alkaline • 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