Now with an easy-to-see Green reticle, the XPS2 is the shortest and lightest HWS sight yet. The Green reticle is approximately 6X easier to see than red in daytime which can lead to faster target acquisition. With a single 123 lithium battery configuration, the XPS2 provides additional rail space, leaving more room for rear iron sights or magnifiers. Also offering water-resistant capability up to10 feet, the XPS2TM 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