【BEFORE ORDERING】Check your right size of laptop privacy screen protector 12.5 inch, measurement(except edges) - Aspect Ratio 16:9 - Privacy screen filter size W*H: 10 15/16 * 6 1/8(277mm x 156mm). Please measure monitor screen dimensions before purchasing. | 【PRIVACY PROTECTION】Protect your data from visual hackers, cameras and work securely anywhere. Computer privacy filters work by blocking lights from certain angles to render your screen black. Your privacy filters' more than 60 degree viewing angle will not be able to read your information from screen, regardless of distance. | 【ANTI GLARE/BLUE LIGHT/UV LIGHT/RADIATION】The matte side of monitor privacy filter with anti-glare ≥80%, anti uv light ≥96%, anti-blue light ≥65%, scratch resistant and excellent color transmittance. Reducing eye strain, preventing myopia & dryness, hyperemia and so on, focusing on & effectively improving your work and kid's learning. | 【EASY TO INSTALL】If the GROOVE between the screen and the frame is DEEPEN, recommend unremovable installation which is clearer than removable. PLEASE CHECK WITH SPECIFICATION BEFORE INSTALLATION OR CONTACT US. | 【APPLICATION】Blue light screen protector is suitable for business traveler, students, mobile workers and commuters, as a safeguard sensitive corporate information while working in airplanes, subways, airports, school, cafe store, lab, library, finance and other public areas.