Illuminated Motion Sensor Technology (MST) Waterproof, Fogproof, & Shockproof Designed for competitive speed shooting and personal defense, the newest DeltaPoint Pro model features a large 6 MOA red dot that excels at rapid, close-range target engagement and increases accuracy when it matters most. The DeltaPoint Pro is proof that you don*t have to compromise performance, even on a small sight. Its incredibly wide field of view and crystal-clear glass dominate the competition, while its rugged aluminum housing and steel sheath ensure it will perform in the harshest conditions. This extremely versatile sight has an easy-access battery compartment, so you don*t have to re-zero after a battery change. It also has click-adjustments for more precision. And this isn*t just a pistol sight either; the DP-Pro is ideal for AR*s, shotguns, and pretty much anything else that fires a round.