1.15mm large wide-angle eyepiece:Some optical lenses, coated blue tape evepieces are adopted. The system consists of a part and a single piece. At night, when observing an object with weak light, it may not be possible to observe clearly in a black state. 2.30mm large objective lens flatness thread: The 60mm large objective lens increases brightness. The spray matte paint on the inner wall of the objective lens effectively prevents light from scattering in the object lens cone and eliminates stray light. Coated with dust-proof grease to absorb dust and particulate matter. 3.Optical lens Green film coating: Adopts multi-layer synthetic coating technology for the full optical lens, providing a comfortable viewing experience, increasing the sharpness of imaging, widening the transparent band and flat vision field, improving eye protection effect and color reduction. 4.Zoom adjustment: Allows for 10 - 30 times random zoom adjustment.