1.1. Multi-layer optical design to improve image quality: Our binoculars use multi-layer optical coating to improve image quality. Advanced optical design ensures clear and sharp images, allowing you to see details clearly. 2.2. for daily use, versatile: These monocular telescopes are designed to be waterproof and suitable for various outdoor activities. Whether you're hiking, camping, or exploring nature, you can rely on these binoculars to withstand wet conditions and deliver reliable performance. 3.3.excellent light transmittance and clarity: sights use BAK4 prism material, which has excellent light transmittance and excellent image clarity. This high-quality prismatic material guarantees better brightness, contrast and color reproduction, resulting in a more immersive viewing experience. 4.4. Dual focus system with diopter adjustment: The pocket monocular telescope has a dual focus system, including a front focusing wheel and a diopter adjustment ring located near the eyepiece. This allows for precise focusing, ensuring you can easily adjust the binoculars to suit your personal visual needs.