Features: 1.Introduction - Used for blocking blue light and sunshine. Smart indoor and outdoor discoloration would provide protection for your eyes. 2. Material - Quality alloy made, which features light weight and long durability, and provide comprehensive protection for your eyes indoors and outdoors. 3. Anti blue ray radiation - Effectively block the harmful blue light in the 385-445 NM band, relieve visual fatigue, and protect the eyes. Protect your eyes against harmful blue rays from computers and cell phones, etc. 4. Discoloration - You can also choose our bluelight-blocking glasses with discoloration function. It would protect eyes from harmful rays in the sun. 5. Size - Frame width: 55mm, Frame height: 53mm, Total width: 148mm, Nose Pad distance width: 24mm, Temple length: 148mm. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material: alloy Color/Style: As the picture shown Weight: 26g Package List: 1 x Glasses