The Armasight Orion 4X is a mid-range night vision weapon sight that provides 4x magnification with a 12 degree field of view. It has an F1.4 lens system, operates from 10 meters to infinity focus range, and can adjust diopter from +5 to -5. It is water resistant, uses a single CR123 or rechargeable battery, and has a 40 hour battery life. The Armasight Orion 4X is arguably the highest performing Gen 1+ night vision weapon sight available.