Blue Light filter for Samsung Galaxy S4 UV Filter HD Clear Premium Quality Film (Two Pieces for Front) - Saves Your Eyesight from Harmful blue Light & UV light - comes with by PYEPYD Blocks harmful UV and Blue-Lights. Prevent Hyperopia, Eye Fatigue, Eye Irritation, Melanin, Insomnia, and Dry Eye. Specially Designed for Children. The Package includes 2 pcs Film, Installation Guide, Fiber Cloth, Soft Card, Dust Removal Sticker, Alcohol Pad. Most informative information about blue light spectrum eBook included.