The extremely compact Micro H-2 offers up to five years of constant on power from a single CR-2032 battery, and has 12 brightness settings for optimal performance in any light conditions. This sight is completely waterproof, and is a result of feedback coming from hard core customers desiring an even more hard core Micro sight. With a redesigned and reinforced house body, as well as flip-up covers protecting the lenses, the Micro H-2 can withstand all types of environmental conditions. And thanks to new optical lenses and cutting edge lens coatings, the optical performance and the shape and clarity of the red dot are radically improved.