Feature: 1. Magnetic Adsorption: Just place the protective film on top of the laptop and let the magnets attach to the screen. Easily remove and reconnect when needed. 2. Applicable Scene: Suitable for offices and public areas. It limits the viewing angle to +/- 30 degrees, the data is only visible to the person directly in front of the display, and the person snooping sees nothing. 3. Secrecy Protection: 15% to 23% higher definition than other brands of monitors. When viewed from 30° to 60°, the protective film makes the screen appear dark and see nothing. 4. Anti Blue Light: Anti blue light design, anti reflective surfaces improve viewing comfort, protects your eyes by filtering 96% of UV rays and reducing blue light by 70%. 5. Easy To Use: This laptop protective film is suitable for 15.4 inch screen size, sturdy, durable and easy to use, just take out the product and use it. Specification: Item Type: Laptop Screen Protector Material: petProduct Size: Approx. 344 x 224mm / 13.5 x 8.8in, 15.4inApplies To: for OS Laptop Pro (2016-2019) (A1707 A1990) Parameter: 1. Magnetic Adsorption, Seamless Cover, Magnetic Secrecy Film is Only 0.39mm Thick (0.78mm with Magnet) 2. One Second Adsorption, and Paste and Use 3. Various Scene, Such As Offices, Airports, Cafes, Trains, Etc.. Package List: 1 x Laptop Screen Protector1 x Dust Free Cloth Note: With the protective film attached, your laptop will not shut down completely, but sleep mode will still work.