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 ManualNote: Due to manual measurement, there might be a tolerance in product dimensions. Due to lighting effects and screen settings, the item's color may vary slightly from the images shown.