Specification: Material: AP Frame + PC Lenses Color: Black Frame Lens Diopter Range: -6.0 to +3.0 Diopters Frame Measurement: as shown in picture Centration Distance: 63mm Features: Variable focus eyewear with zoom functionality. Instant focus control with independent adjustment of prescription and magnification for each eye. Adjust lenses easily by turning the dial. Lightweight design. Simple to use. Portable and convenient to carry. Durable construction. Suitable for reading and distance vision. Ideal for computer use, reading, watching TV, and day or night driving. Can be kept at desk, workbench, or used as backup glasses. Package Included: 1 x Adjustable Strength Lens Reading Glasses 1 x Storage Bag 1 x English User Manual