1. Wide-angle eyepiece, HD optical lens, HD field of view. 2. Strong metal mirror has clear imaging. 3. Reduce emissivity and improve transmittance. 4. Installation method; Place the eyepiece directly at the joint of the eyepiece tube of the microscope. 5. The eyepiece lens body can be rotated and adjusted until there is a scale mark line at the clear place, which can be adjusted according to the binocular visibility.