Instant Snap-on Magnetic Attachment: Simply place the privacy screen along the top of your MacBook and let the magnets attach securely. No need for tricky alignment, tape, or permanent adhesives. Easily remove and reattach as needed. Note that when the privacy screen is attached, the laptop will not close completely, but sleep mode remains functional.LEAVE VISUAL HACKERS IN THE DARK: Protect personal and business data from onlookers. The filter darkens the screen when viewed from the sides, while maintaining clear viewing for you. Keep your information secure with this reliable privacy solution.WE'VE GOT YOUR SCREEN COVERED: This 19-inch diagonal desktop filter is one of 26 models designed to fit thousands of displays, using high-quality polymer film. Compatible with both standard and widescreen monitors across a wide range of aspect ratios.EASY INSTALLATION: The privacy cover is simple to apply. Features high-quality materials for durability. Full installation instructions included for hassle-free setup.BLUE LIGHT & ANTI-GLARE EYE PROTECTION: Helps reduce harmful blue light exposure by 60%. The anti-glare surface minimizes reflections and eye strain. With a 3H hardness rating, it also provides scratch resistance and added screen protection.