1. [10 - 300x25 high magnification] The magnification is upgraded from 10X to 300X to provide a wider, clearer and brighter scene for your eyes. Adjust the magnification of this zoom monocular according to your needs, and it will you visual fidelity and let you see the wonderful world. 2. [Upgrade large comfortable objective and eyepiece] Monoculars use BAK4 prism with FMC green film and HD blue film, upgrade 12mm eyepiece and 25mm objective lens, which greatly broaden the field of view and no longer limit the field of view. 3. [ and anti - fog design] It is made of aluminum alloy and rubber, and high - purity nitrogen is used to fill the inside of the compact single - tube optical element to prevent dust from entering the inside of the single - tube. The high tube has waterproof and anti - fog functions, suitable for any weather and any environment. 4. [Amazingly clear vision] Dual focus design, high light transmittance, and the focusing sight can provide you with brighter, higher - contrast images. You can turn the eyecup upward to deeply focus the field of view for yourself, and then adjust the focus and zoom adjustments until the field of view becomes clear.