EOTECH HOLOgraphic 555.A65/1 Weapon Sight AA Battery; 65 MOA circle with 1 MOA aiming dot reticle pattern; Compatible with Gen I-III+ Night Vision Systems (tandem operation); Includes rugged aluminum hood assembly and knobbed tool-less mounting bolt; Interfaces to 1" Picatinny (MIL-STD-1913) rail Optics: Transmission holography - parallax free; Magnification: 1x; Eye Relief: Unlimited; Length/Width/Height: 5.6"x1.8"x2.8" ; Weight: 1 lb., 13.6 oz ; Temperature: -40 to 150 F; Waterproof: Submersible to 66 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.