Offering true 2 eyes open shooting, a transversly mounted lithium 123 battery, and 7 mm raised base offering iron sight access, the new EXPS2 features easy to adjust side buttons and an adjustable, locking, quick detach lever for easy attachment and removal. * Reticle is a 65MOA circle with two 1 MOA aiming dots * 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 * Battery compartment is now separated from the base to allow it to hover over the delta ring of the rifle * Average battery life at brightness level 12 is roughly 600 hours * Side buttons with an adjustable, locking, quick detach lever for easy attachment and removal.