Optical glass lens plate, can be replaced with different magnifications With the two double-sided glasses of the lens, you can get clear stereoscopic vision in a wide field of view Sturdy and compact elbow-worn tape that easily adjusts the user's head size by It is very convenient to use: the user does not need to take off the glasses, and the hands can move freely. Suitable for precision machining, engraving, testing, drawing and electronic micro-components, garden maintenance. Suitable for the work of s, veterinarians, beauticians. Jewelry processing, sewing, embroidery, philately. Reading, painting, crafts, fishing hobbies, etc.