Advanced Anti-Blue Light Technology: Filters out 90% of blue light from the screen to protect your eyes from ocular damage and visual fatigue. Special Design: Different from other anti-blue light screen protectors on the market, our advanced technology allows some blue light to pass through outdoors. Premium Tempered Glass: Made of 9H hardness tempered glass, three times stronger than regular PET film, with advanced electroplated fingerprint oil-coated glass. Sensitive Touch: The screen protector provides an infinitely smooth and sensitive contact, allowing for quick and precise finger movements. Multiple Pieces: Packaged in 3 pieces to offer more choices for replacement of phone screens.