EOTECH HOLOgraphic 552.XR308 Weapon Sight Optics: Transmission holography - parallax free; Magnification: 1x; Eye Relief: Unlimited; Length/Width/Height: 5.4"x1.8"x2.25" ; Weight: 10.9oz; Temperature: -40 to 150 F; Waterproof: Submersible to 33 ft depth; Sealing: Fogproof internal optics. Optics: Transmission holography - parallax free; Magnification: 1x; Eye Relief: Unlimited; Length/Width/Height: 5.4"x1.8"x2.25" ; Weight: 10.9oz; Temperature: -40 to 150 F; Waterproof: Submersible to 33 ft depth; Sealing: Fogproof internal optics. Adjustment (per click): 0.5 MOA (1/2" at 100 yds); Adjustment Range: +/- 40 MOA travel Night vision compatible model.