Warranty provided by Hazuki is not covered. Product Name:Hazuki Large Lens size:Large lens Magnification: 1.85x magnification Color: Black Refractive index: 3.4 Dpt Focal length: [Work at hand] 22~28cm Lens type: Clear lens with 35% blue light cut UV cut: UV ultraviolet rays 99.99% cut Load capacity: 70kg Size: [Body] W145 x H45mm [Lens size] W128.6 x H42.5mm [Frame length] 164.5mm Weight (g): 26.5 The large lenses and long vane make it easy to stack the lenses on top of each other, and the wide field of view magnifies the size of two pages of a weekly magazine clearly and vividly. Caution (Disclaimer) > Please read carefully. The focal length and visibility of Hazuki Magnifiers vary from person to person. The "vision compensation" described in the manufacturer's warranty is only available through direct sales from the manufacturer and is not covered by the warranty.