Fast, 60Hz refresh rate assures smooth real-time viewing and target speed assessment. The 25mm f1.1 high-transmitting Germanium lens is AR coated and provides 1.75x native magnification and wide (18°x14°) field of view. Mechanical calibration shutter and high-contrast OLED further assures industry leading clear and crisp imaging. Proprietary, user-controlled Region of Interest (ROI) Optimization improves image clarity at your point of aim. Digital suite of features includes onboard recording of still images or videos, 4 polarity pallets, incremental zoom, 4 reticle choices and analog and USB output options. This HALO imaging sight has a detection range of 1120 yards, recognition range of 386 yards, and the identification range is an impressive 195 yards in optimum conditions. The N-Vision Optics HALO thermal imaging scope works on 4 CR123A batteries. Tough, waterproof composite housing, AMD Picatinny mount and 5-year warranty complete the package.