What's blue light? Blue light is a type of visible light that is emitted by electronic devices, including smartphones, tablets, and computer screens. Prolonged exposure to blue light from these devices can disrupt the body's sleep cycle and cause digital eye strain or retina damage. Protect Your Vision, Improve Your Sleep, Enhance Your Life Our screen protectors are designed to filter out harmful blue light emissions from your electronic devices, reducing dryness of your eyes and improving your focus as well as sleep. Our anti blue-light block up to 70% in 300-400 nm & 44% in 400-470nm. No Scratches, Smudges, or Cracks Made to be water, oil, and fingerprint resistant thanks to a special hydrophobic and oleophobic coating, use your phone anywhere and everywhere - it'll stay smudge-free. Our Impact Anti-Bluelight screen protector is ultra-thin at 0.26 mm, while protecting against drops up to 4.9 ft. With 20% stronger drop protection than the industry average, and increased edge strength for additional durability to cracks and drops (tested up to 30 kg!), your phone will stay safe, while your expectations are shattered. Flawless Application Made Easy With a new included CASETiFY applicator, easily apply your new screen protector at home, hassle free!