The rugged body makes this the perfect sight for high powered rifles. The 34mm reflex lens provides a sharp image in all light conditions during rapid firing while tracking targets. Parallax-free sight with unlimited eye relief and four different reticles uses three LR44 batteries (included) for 10 hours of power. Fully adjustable for windage and elevation. Features 7 step digital brightness adjustment with memory. Compact unit, 3.6x2x1.5" with 15 minute auto shut off. In matte black finish and mounts simply on Weaver style rails.