Usage Tips:Feature 1BLUE LIGHT BLOCK RANGE: Through a variety of different UV resistant materials and multi layer coating technology, blocking more than 99 percent of harmful blue light between 400NM500NM 2COMPREHENSIVE PROTECTION: The blue light is blocked by absorption and reflection, which not only prevent the harm of blue light on the front, but also reduce the damage caused by the reflection of blue light behind the lens. Protect your eyes from blue light in all aspects, and take care of your eyes in any environment 3COMFORTABLE AND SCRATCH FREE: Excellent PC nose clip, comfortable to wear, lens edges are polished with a frosted process to avoid the risk of scratches 4WIDE RANGE OF USES: Can be used for mobile phones and computers to prevent radiation, blue light and fatigue 5WITH BAG: Equipped with a storage bag for easy storage, portability and access, and also prevents damage and lossItem Type: Blue Light Blocking GlassesMaterial: PCLens Material: PC polyesterBlue Light Block Range: 400500nmUses: Mobile phone computer prevent radiation, blue light and fatigue Package List: 1 x Blue Light Blocking Glasses1 x Storage Bag