Protect Your Eyes and Your Sleep Schedule - The TECH ARMOR Way! Prolonged exposure to smartphones and tablets can cause digital eye-strain. Devices with LED screens release a form of bright, blue light. Blue light is desirable to device manufacturers because of its efficiency and power. The downside for our children and us is that because of the intensity of the blue light, it can cause digital eye-strain. Blue light exposure can also lower melatonin levels associated with deep, peaceful sleep. Tech Armor realizes that simply limiting exposure to smartphones and tablets for children and adults is easier said than done. In the real world people want real solutions. Solutions that will allow them to stay connected and enjoy their content when and how they want it. Solutions that will give them peace of mind knowing their children can continue using their favorite devices for education and fun without creating worry about endangering eye health. Backed by the TECH ARMOR LIFETIME REPLACEMENT WARRANTY! COMPATIBILITY: iPhone 5, iPhone 5c, iPhone 5s (all carriers, all models) ALSO AVAILABLE: Tech Armor RetinaShield Blue Light Filter Screen Protector for iPad Air, Amazon Part: B00GPABJQS The TECH ARMOR Screen Protector Kit Includes: - One (1) Screen Protector - Installation Instructions - Smoothing Card - Lint-Free Polishing Cloth - Bubble Removal Tape - Retail Packaging INSTALLATION: Please visit our amazon Webstore and watch the installation video to get the most of your screen protection investment!