The LS8100 is driven by an APC driver circuit to provide a constant optical power output throughout the life of the battery. The laser passes through a top quality, multi-coated optical glass lens for a noticeably sharper and smaller dot at farther distances. An easy to use four point alignment system effectively holds your zero for reliable elevation and windage adjustments. The 532nm green laser diode has a visible range of 100 yards in broad daylight and 1 mile at night.