Lucid’s HD-7 Red Dot Sight has four unique operator selectable reticle's to choose from, providing a wide variety and serious flexibility to the shooter.  Add in that it is water-proof, fog-proof and shock-proof – and it runs on a simple, ordinary triple-a battery and you’re looking at a state of the art sight.  State-of-the-art red dot sights and magnification at price points every shooter can afford.  That is what Lucid is all about!   (info provided by www.mylucidgear.com)