Welcome to our store! Protect your eyes with our computer screen filter! This filter blocks harmful blue light in the 380-420 nm range. Advanced blue light blocking technology protects your eyes, sleep, and skin from the negative effects of overexposure. Compatible with 22-inch (475x297.5 mm) desktop computer screens. Perfect for students, office workers, gamers, and programmers in their offices and homes. Made of highly transparent PET material, effectively preventing screen dust and scratches for comprehensive HEV protection. Enjoy better sleep and protect your health with our blue light blocking screen protector. Easy to install and bubble-free! After cleaning the screen, simply remove the film on both sides of the filter and attach it. Item Type: 22 Inch Computer Screen Filter Material: PET Size: Approx. 475x297.5 mm / 18.70x11.71 in Package Includes: 1 x Screen Protector 1 x Dust-Free Cloth 2 x Adhesive Stickers 12 x Double-Sided Adhesive Customer Satisfaction - Customers are our top priority. If you find any problems with the product after receiving it, such as damage or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory customer service.