1. Wide Field of View 10x magnification, 42mm objective lens diameter; when using this binocular, the view is expansive and exceptionally clear for its magnification. 2. Professional, Performance Binoculars Multicoated aspherical lens elements ensure light transmission and minimal distortion, delivering better brightness, contrast, and image quality. The BAK4 prism provides a round exit pupil, offering bright, clear, and sharp vision. 3. Sleek and Durable Daily waterproof housing with a rubbercoated surface for shock resistance and a firm, comfortable grip. Built to last and portable for outdoor use, even in harsh environments. However, please do not submerge the binoculars in water. 4. Easy to Adjust The central focus knob of this compact binocular ensures quick and precise focusing. The right eyepiece ring also allows for diopter adjustment. It can be used with a tripod, making it very convenient for prolonged observation.