Bostron TescopeMod:10X50 Structure:Binoculars Function type:Ordinary tescope Use:Civil tescope Instrument magnification:10 times 1. Specifications: Magnification: 10 times Objective lens diameter: 50mm. Exit distance: 20mm Prism material: BAK4 optical gl Fid of view: 7.1 degrees, 124M/1000M Waterproof performance: nitrogen-filled and waterproof. Net amount: 890g 2. Lens BAK4 optical gl, 12 layers of anti-UV anti-ren film, wide fid of view, high definition. 3. Features: There is almost no need to adjust the tescope, the objective lens is green film, the one-yuan coin is large eyepiece, the e are adjustable, the e are very comfortable, and the real long-term can not see dizziness. Not only waterproof, mildew and anti-fog, if you accidentally fall into the water, it will not sink. With a built-in comp, after the battery is installed, pressing the button built-in comp will light up, even if you don''t worry about getting lost at night. 4. The 10x50 nautical tescope is a highly sealed tescope with a comp reticle. It has the characteristics of clear fid of view, high brightness, good image , vivid color and wide adaptability. Its main technical indicators have reached the advanced lev of similar products. Therefore, it is suitable for use in transportation, ocean, forestry, aviation, ectric power, surveying, etc. Of course, the general nature of use or outdoor tourism, the effect is best. 5. This mod is nitrogen-filled and waterproof, can be used around the clock, built-in red LED lighting comp, can indicate 360 a??a??degree orientation. With distance measuring ruler, no need to calculate, can directly read the target distance, 10X50 FMC coating, making the image super clear and bright, stable and comfortable observation. Large depth of fid design, the focal length is adjusted once in place, no need to repeat the tedious focus. Ideal for sailing, adventure, outdoor sports and more. The package includes: 1 x waterproof tescope 1 x floating shoulder strap 1 x nylon bag, a mirror cloth 1 x bag of moisture-proofing agents