· A waterproof military binoculars, designed for marine and terrestrial observations· Internal rangefinder scale and directional compass with illumination switch indicate the distance or size of the object being viewed and its orientation· Durable rubber armored coating is comfortable to hold and rugged enough to stand up to any conditions· Nitrogen gas inside the binocular eliminates fogging and mold on internal lens surfaces even under extremely severe condition, such as rainstorms and high humidity.· Hi-index BAK4 prism features a bright, sharp image with vivid contrast to offer you every little detail of an object.· Large lens design, 26MM lens are more comfortable to view objects without eye fatigue, dizziness, with a vision combination of wide angle and HD· The binocular has a large 50mm objective lens, even in low light conditions, such as at dusk and dawn, it can also provide the maximum brightness of the image· IPX7 water resistant,can work normally in heavy rainy daySpecifications:Magnification: 10xCaliber: 50mmPrism System: PorroPrism Glass: BAK4Focus System: Left + Right Eyepiece Field Of View: 396 ft /1000 ydsView Angle: 5.6Exit Pupil: 5mmEye Relief : 7.1mmEye Cups : Fold DownCoating: FMC