Function: 1. The larger the aperture, the brighter the image, from the same distance, the larger the aperture, the better the brightness of the field of view. 2. The optical lens adopts high-definition blue coating, high-quality coating, higher light transmittance, 3. Right eye lever type adjustment which is easy, convenient, precise and accurate, 20-180 times. 4. Non-slip bean convex focus knob, focusing is easier, no slip left middle eye adjustment method, easy to use. 5. There is a tripod connector at the bottom, and the connection to the mobile phone for taking photos and videos is more stable, which is good for observation at a fixed point under high magnification. Specification: Item Type: Binoculars Prism material: ВAK4 Protective material: rubber Color: as shown in the picture Binoculars Size: Approx. 24 x 20 cm / 9.4 x 7.9 inch Weight: approx. 1343g / 47.4oz Model: 20-180x100 Structure: binoculars Function type: telescope with zoom Purpose: civilian telescope Magnification: 20-180X Objective lens diameter: 60mm / 2.4in Eyepiece diameter: 18mm / 0.7 inch Lens Coating: Multi-layer wideband blue FMC film Focusing method: central right eye Convenient distance: 20m ~ 1000m Field of view (m / degree): 56M 1000M / 4.2 degrees Package list: 1 x binoculars 1 x user manual 1 x bracket 1 x cloth 1 x hanging rope 2 pairs x eyepiece cover 1 x binoculars bag