Material: all-metal body, strong and durable, feel good Focusing mode: Rotating focus Coating: Blue film Ling mirror information: high quality composite achromatic optical lens Eyepiece diameter: about 8mm Objective lens diameter: about 17.5mm Magnification: 2.5X Field of view distance: 8m/600m Field of view angle: 6.5 degrees Outlet diameter: 16mm Outlet distance: 13.5mm Product size: only 35X22 mm Packing size: 6cmX5.2cmX6cm Product net weight: 20g Product gross weight: 28g Form: 3-piece 2-group objective Diameter 22 mm, 35 mm long, net weight 20 g (excluding the protective case), due to the use of three 2-piece objective lenses, the image is clear and the image is bright. Small size, you can observe distant objects just by putting them on your fingers! It is bigger than the thumb. Easy and versatile anytime, anywhere! May be a small telescope in the world ★All use high-quality composite achromatic optical lens, high quality anti-reflection film, all metal. ★ Multiple real, high definition quality. Due to the light shooting and the configuration of each monitor, the display image may be slightly different from the physical object you received, please forgive me!