Frame material: polycarbonate frame with spring hinges, high quality and durable. Usable intensity/diopter: +1.0, +1.5, +2.0, +2.5, +3.0, +3.5. Blue light lens that can protect your eyes from harmful blue light. Let yourself go through work and life for a long time without getting tired. Classic reading glasses and fashionable color combination, suitable for men and women, show their elegance and shape their own unique self. The classic round shape is suitable for men and women of all ages and face shapes.