• Blocks 90% of harmful blue light emissions from the screen, helping to prevent insomnia, eye strain, headaches, dry eyes, and blurred vision. • Developed by Swiss medical professionals to protect your eyes and improve sleep quality. • Easy to install without the need for adhesives; can be easily removed, cleaned, and reattached. • Universal fit for computer monitors from 26" to 27" inches. Filter dimensions: Width: 635 mm / Height: 415 mm. • Includes a free webcam cover to protect your privacy when not in use. • Package contents: 1 blue light filter, 1 cleaning cloth, 1 manual.