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, it's 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 can well control the magnification. With comfortable light nose support, it will not leave a red mark if worn for a long time. It's suitable for reading, gaming, watching TV and using the computer etc. Specifications: Material: PC Frame Color: Black Degree Adjustment Range: -300 to 600 Mirror Leg Length: 12.6 cm(Approx.) Lens Height: 3.5 cm(Approx.) Single Lens Width: 5.1 cm(Approx.) Package Contents: 1 x Glass 1 x Glasses Cloth 1 x Storage Box 1 x Visual Chart 1 x User Manual Please note: Due to manual measurement, there might be a tolerance in the product size. Due to the lighting effects and shooting angles, the color of the item and that shown in the picture might have a nuance.