RETINAGUARD Anti-Blue Light Screen Protector for popular mobile phones and tablets by RG, INC Effectiviely blocks 90% of harmful blue light from LED screens. Excessive blue light exposure found in LED screens may lead to imbalanced melotonin levles found in sleep disorders and eye strain and fatigue. RETINAGUARD uses exclusive technology and has been professionally tested by INTERTEK and SGS LABS, ensuring quality in products for over 130 years. We understand the potential harm of excessive blue light exposure in children and adults who actively use LED devices and take great pride in achieving the necessary requirements to ensure that RETINAGUARD is the highest performing and most trusted blue light Screen Protectors on the market, the RG, INC.