Our advanced closed emitter design shields against all elements for peak performance in any environment.It features a user-selectable 3-segmentreticle with 10 day/2 nv brightness settings allowing you to customize visibility for every scenario.Setting 5 gives an impressive 25,000+hours of battery life, complemented by automatic and manual brightness control along with a convenient shake awake feature.Plus, the recoil block ensures alignment and zero hold.It is ip67 water/dust proof rated.This durable optic is built for precision.Battery Size: CR2032Magnification: 1xEye Relief: InfiniteWeight: 5.33 oz