The Sightmark® Ghost Hunter 1x24 Night Vision Goggle Kit delivers a high quality image and resolution that illuminates the darkest night with maximum visibility. The monocular is equipped with a head mount for comfortable, long-lasting, hands-free operation when flipped down, and can be flipped up when not in use. The monocular has a 1x magnification that allows the user to maintain depth perception and view images clearly while navigating, and features a built-in IR illuminator for extra range in darker situations. Included is an automatic shut-off feature, which turns off the unit when exposed to bright light sources, ensuring years of operation. Protected by a three-year warranty on the tube and Sightmark's Limited Lifetime Warranty on the housing, the Ghost Hunter 1x24 Night Vision Goggle Kit is engineered to meet the highest requirements and standards of the serious night vision user. Generation 1 Tube Type EP33-U Photocathode Type S25 multi-alkaline photocathode Useful Photocathode Diameter 24 mm Integral Photocathode Sensitivity, typical 200 Resolution 30 lines per mm Max. Detection Range of an Object Measuring 1.7x0.5 m in Natural Night Conditions 80 / 87 m/yd Magnification 1 x Objective Lens Diameter 24 mm Field of View 30 degrees Field of View 54 m @100m Field of View 162.4 ft @100yd Minimum Focusing Distance 1 / 0.3 ft/m Eye Relief 12 mm Diopter Adjustment ±5 Power Supply 3 V Battery Type 2x AA Battery Life (with IR) 20 hours Battery Life (w/out IR) 72 hours IR illuminator power 75 mW IR Wavelength 805 nm Lens material glass Body Material glass filled nylon composite Tripod Mount 1/4 in Operating Temp,?F/?C -4 to 104 / -20 to 40 F/C Nitrogen Purged no IP Standard IPX3 (weatherproof) Length 5.47 / 139 in/mm Width 2.24 / 57 in/mm Height 2.91 / 74 in/mm Weight 8.8 oz