The focus adjustable glasses allow you to easily adjust focus by simply turning the dial to adjust the lens, with a discreet dial knob on each side to find the magnification that's right for you. The focusing glasses can meet the needs of most users. Features: Made of high-quality PC material, suitable for all face shapes and comfortable to wear. By turning a knob, the sides of each lens can slide relative to each other until the right focal length is reached. The degree adjustment range is -300 to +600, which effectively controls magnification. Features a comfortable lightweight nose pad that won't leave red marks even after extended wear. Suitable for reading, gaming, watching TV, and using the computer. Specifications: Material: PC Frame Color: Black Degree Adjustment Range: -300 to +600 Temple Length: 12.6 cm (Approx.) Lens Height: 3.5 cm (Approx.) Single Lens Width: 5.1 cm (Approx.) Package Contents: 1 x Pair of Glasses 1 x Glasses Cloth 1 x Storage Box 1 x Visual Chart 1 x User Manual Note: Due to manual measurement, there might be a tolerance in the product size. Due to lighting effects and shooting angles, the color of the item may slightly differ from the pictures. Please allow slight dimension differences due to different manual measurement methods.