The EOTech XPS2 is the shortest, smallest and lightest EOTech model holographic weapon sight available without night vision! This sight is smaller and lighter than the other HWS sights and runs on a single 123 battery. With the new single battery configuration, the XPS allows more rail space than ever, leaving more room for rear iron sights, magnifiers or NV mount. Smaller, lighter and always fast; the XPS series is a great compact option for your platform. Product Features Single transverse 123 battery to reduce sight length Shortened base only requires at most 2 3/4 inch of rail space Battery cap and latch are eliminated and replaced with a simple O-ring, tethered cap; better sealing is achieved Average battery life at brightness level 12 is roughly 600 hours The XPS2 is not Night Vision compatible, for Night Vision compatibility see the XPS3 sights. Operation Optics: Transmission holography - parallax free Magnification: 1x Eye Relief: Unlimited Length/Width/Height: 3.5 x 2 x 2.4 (88.9x50.86x60.96) Weight: 8oz (227 grams) Temperature: -40 to 150 F 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 Weaver or Picatinny (MIL-STD-1913) rail Return to Zero: Repeatable to 2 MOA after re-mounting Night Vision Comatibility: none Hands-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: 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