"New, slightly damaged item ★ Box has scratches/dirt, but the contents are new." 21.5-inch (16:9) Anti-Spy Filter LCD Screen Protector 21.5 inch "Product Condition" "Product Information (for new items)" "Main Specifications" 【Compatible Models】21.5-inch, aspect ratio 16:9. Filter size: Filter area only is 476 x 268mm (vertical/horizontal dimensions may have +/-1mm error). 【Privacy Protection Filter】 Viewing angle 60 degrees. The screen appears clear when viewed from the front, but appears dark from adjacent seats. This "anti-spy filter" has polarizing properties. It prevents peeking from the side in offices, cafes, airplanes, and bullet trains, allowing you to use your computer with peace of mind. Made of PET material, it is resistant to scratches and fingerprints, and provides excellent performance over a long period. 【Blue Light & UV Cut】 Excessive exposure to blue light can lead to dry eyes, eye strain, and, in severe cases, headaches and sleep disorders, potentially causing "digital jet lag." This product blocks approximately 49% of blue light and cuts 99.9% of UV rays, protecting your eyes from harmful light during long hours of computer work. 【Double-Sided Use】 One side has an anti-glare treatment to reduce reflections from sunlight and fluorescent lights, making the screen easier to see. The other side has a high light transmittance of 80%, providing a glossy finish, high anti-spy effect, and beautiful display without compromising screen clarity. You can freely switch between both sides depending on the environment and purpose. 【Two Installation Methods】 There are two installation methods: "slide-on" and "double-sided tape." Installation and removal are easy. Unlike magnetic privacy films, the bottom is less likely to lift, and there is no impact on the screen from magnetism. Also, the magnetic force of the screen frame varies, making the filter installation unstable. We recommend slide-on privacy films for those with laptops with weak magnetic force. 【Important Notes】 The privacy protection effect may vary depending on the angle and brightness. B0CHWF68R8