Welcome to our shop! Features: UV Protection: Filters harmful blue light and UV light (380-420nm). Blue Light Blocking: Protects your eyes, sleep, and skin from the negative effects of blue light exposure, reducing eye strain. Easy Installation: Simply peel and stick after cleaning your screen. Convenient and Practical: Easy to apply without bubbles, removable and reusable. Acrylic Material: 21.5-inch screen compatible, high light transmittance, dust and scratch resistant. Provides broad HEV protection. Specifications: Item Type: Computer Screen Protector Material: Acrylic Suitable for: 21.5-inch screens (approx. 330 x 537 mm / 13.0 x 21.1 inches) Filter Wavelengths: 380 to 420nm blue light (beneficial light is not filtered), 99% UV protection Features: Easy to install, prevents eye fatigue, RGB color supports self-coloring Package Includes: 1 x Computer Screen Protector 1 x Cleaning Cloth 1 x Wiping Cloths 2 x Anti-slip Stickers Your satisfaction is our top priority. We will provide you with the best service. If you encounter any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!