BAK4 military nautical binoculars 7x50, with rangefinder - distance measurement with the compass, large lens for wide fields,(Blue) The product is based on the color or size of the main image of the product page. The binoculars with the sailor's compass - built-in ruler for measuring distance and built-in compass for orientation. By specifying the ruler, you can directly calculate the distance to the object on the left eyepiece. With the integrated light-emitting compass you can calculate the orientation (in a dark environment, the ruler and the compass are illuminated by the light button)Double strap - a wide thickened neck loop, a shoulder strap; You can use one of these to make this great product easy to carry and use for a long time.Professional optical glass and coatings - 50mm lens, 26mm oversized BAK4 eyepiece, the lens with a green FMC anti-reflective coating and the eyepiece with a blue FMC coating contribute to a significant reduction in the reflected light in the objective lens, an effective improvement in light transmission , a great improvement in image brightness and sharpness, good performance in low light conditions;The focusing system with the binoculars - The military-grade left and right eyepieces can adjust the focus to 100% meet the different vision requirements in accordance with the left and right eyes; The eyepiece cover can be folded quickly so that you can use it very easily with glasses; With the eco-friendly rubber skin design and uneven lines, your hands can easily stick to the binoculars;