1WIDELY COMPATIBLE: 17.3 inch laptop screen filter is compatible with for HP, for Dell, for Acer, for Asus, for Envy, for Toshiba, and other 17 inch laptop brands. Please verify screen width and height measurements before ordering. Selection based solely on the diagonal size of the screen is not recommended. 2ADVANCED TECHNOLOGY: The 17.3 inch laptop screen protector utilizes advanced micro blind optics with 2000 anti peeking angle corrections to ensure that any view over +60 degree is blocked. 3EFFECTIVE ANTI DAZZLE: Anti dazzle technology reduces dazzle by more than 90 degrees and softens the light so you won't feel harsh reflections in bright light environments. Unique double sided structure, the glossy surface has a better anti peeping effect, and the frosted surface has a better anti dazzle effect. 4STRONG ANTI BLUE LIGHT: Filtering imported optical material reduces 92 percent of blue light and 98 percent of UV rays, filtering all the harmful light emitted from the screen to guard your eyes. Highly transparent and reinforced built in protective layer not only presents high definition picture quality, but also guards your screen from scratches. 5WIDELY APPLICABLE: 17.3 inch laptop screen filter imitates the real one, size 1:1 matching, compatible with 17 inch computer screen with 16:9 aspect ratio. Perfect for business travelers, students, healthcare workers, mobile workers and bank workers. You can guard sensitive information on airplanes, subways, airports and other public places.