Anti-glare anti-blue light Screen Protector filter blocks the harmful blue light between 380nm~495nm from the wave range of visible lights, blue light reaches the retina with strong energy. This filter reduces digital eye strain when viewing screens and gives you a better sleeping. Compatible for 13.3" 16:9 Laptop (Not Include The Screen Bezel). Before purchase Please Note: Not Compatible with Macbook pro/air 13.3" &Surface Series! Blue Light Blocking: The anti blue light laptop screen protector can block blue ray between 380nm to 490nm for wide range HEV protection,Radiation Protection, Anti-static, relieve the fatigue of eyes and help you sleep better. Workable for short-sighted people, students, office workers, social media addicts, online gamers, fashion lovers, etc. Ultra clear 95% Transparency do not reduce the brightness of screen, no color difference,which restores the screen real color to reduce eye strain, to avoid reducing the monitor and battery life.