2-way use for business/outdoors: Equipped with a 2-way lens that cuts blue light which is indispensable for working on a computer, and a dimming function that will discolor when exposed to UV rays when you are out on the go. [Blue Light Reduction Ratio 40% JIS Standard] The 40% cut lens is suitable for people who use a PC for long periods of time at work, esports, gamers, and smartphones for long periods of time. (Higher values do not mean they are excellent) (Frame Design Features) The rimless frame creates a business look intelligently. Square lens cut creates a sharp and sharp Dundism. (Dimmable and Color Changing Function) The concentration of the clear lenses inside is about 3% transparent. (Because it has been treated with blue light cut, it will have a yellow flavor when you look closely at the same time) The color will be changed to about 30% in the sunny weather when you are out out. This is not too thick (about 60%), it is a color change to light gray and is a soft color sangra type that is often seen on trend and is often worn by Talent. (Also often mistaken is that it does not change color when driving, but most cars have UV protected window glass so UV dimming glasses will not tarnish. It will change color in the sun that is exposed to outdoor sunlight. (UV400 Coating) UV400 protective coating blocks 99% of harmful UVA & UVB rays, protects your eyes from damaging UV rays. Accessories: PU case included, microfiber cloth included, REONAS product **card (PU case color may be black or dark green. Please note that you cannot specify the color of the case) [Weight/Material] Weight: 0.8 oz (22 g); [Features] Blue Light Cut, UV Discoloration, UV400 coat; [Frame Material] Titanium steel (plating); [Size] Frame Width: 5.7 inches (143 mm), Arm Width: 5.9 inches (149 mm), Lens Width: 2.3 inches (38 inches (57 inches (57 mm). [Safe product set] Accessories: Glasses case, cleaning cloth, UV color changing test. Blue Light Cut Comes with a mini blue light and an inspection card for testing. Fast and accurate support for 30 days free exchanges, refunds and online supports.