Qanliiy 30x40 Hd Big Eyepiece Non-infrared Compact Folding Roof Prism Binocular Telescope for Hunting Hiking Camping Bird Watching Multi Coated Optics Guarantee Superior Light Transmission and Brightness,Waterproof Level: High Magnification: 30x40;Field of View: 1500M/ 9000M;Field of View: 8.0 Degree;Eye Lens Diameter: 17mm;Objective Lens Diameter: 40mm Prism Type: BaK4 Monocular Size: 145 x 98 x 48mm Note:The item in Low Light Level Night Vision Function.&lt;br&gt;