20×50 High Power Waterproof Professional Military Compact HD Binoculars have low-light night vision and can be used at night, but not in complete darkness. They are easy to adjust with the focus knob being centered on the binoculars gives you the ability to adjust quickly and still have precision focusing. This powerful, professional binocular provides bright, clear and razor-sharp viewing due to the Bak-4 prism with the multilayer-coated aspherical lenses. This supplies you with superior light transmission and minimal distortion giving you a better contrast and image quality. 20×50 High Power Waterproof Professional Military Compact HD Binoculars has a waterproof body that has a rubber coated finish. This finish gives your binoculars a better shock-resistance and a more comfortable grip. They are waterproof but not submergible so please try not to immerse them into water. When you use this binocular, the vision is broad, and it is very clear for this binocular has a 20x magnification, 26mm eye lens diameter and 50mm objective diameter; 56m field of view at 1000m.