The EXPS2 offers true 2-eyes-open shooting and provides an unparalleled targeting experience. The increased height of the EXPS provides iron sight co-witness access in the lower third of the viewing window. The all-purpose EXPS2 features easily adjustable side buttons and a quick-detach lever (fits both 1" Weaver and MIL-STD-1913 rail). It has a transversely-mounted lithium 123 battery which operates for 600 continuous hours at nominal setting 12 at room temp. It has 20 brightness settings and a scrolling feature, and it is submersible to 3 meters. The EXPS reticle has a 68 MOA circle with a (2)MOA dots.