PYEPYD - Blue Light Filter for 19" Desktop Monitors (W435mm x H292mm x D45mm) (Diagonal - 521mm) Blocks up to 99% Hazardous Blue-Light and UV Lights and help Your Eyesight from its harmful Effects Anti-Blue Light Screen Filters for LED/LCD monitors blocks up to 99% harmful blue light and UV lights. The screen is clear and it will not reflect the light behind TAA compliant and SGS tested to ensure product quality and safety requirements Filter Hangs right on monitor for easy install and removal Can be cleaned with general cleaning equipment without causing harm.