1、Filtering Angle: After installing the filter film, there is a 60° visible area on the front of the screen. When viewed from both sides of the computer (30°‑60° angle), it appears dark and the screen content cannot be seen, effectively preventing office colleagues from peeping and leaking office data. It is suitable for office, station, airport, and public places 2、Harmful Light Blocking: This computer screen protector can filter harmful blue light with wavelengths between 380‑420nm, and blue light blocking technology can prevent damage to your eyes, sleep, and skin; It can also filter 99% of harmful UV and help reduce eye fatigue 3、High Light Transmittance: The screen filter is made of high transmittance acrylic material, effectively preventing scratches and dust on the screen; Compatible with 15.6 inch (361x218mm) computer display, suitable for students, gamers, programmers, office workers, etc 4、Hanging Type: This computer screen filter is easy to install. After cleaning the screen, remove the thin film on both sides of the protector and attach it on the display screen. It can also be removed at any time, removable and reusable, does not cause bubbles and paste 5、Fatigue Relief: This acrylic computer screen filter can help you better enjoy your digital time without worrying about eye fatigue, blurred vision, and headaches, providing you with better sleep and viewing experience, suitable for people who spend long hours on the computer Item Type: Computer Screen Filter Product Material: Acrylic Application: For 15.6 Inch (361x218mm) Computer Display Anti Peeping: Left and right 30 degree can not be seen Light Battery: 30mAh Polymer Lithium Battery (Built in) Filter Wavelength: 380-420nm blue light (no filtering beneficial light), 99% UV protecting 1 x Screen Protector 1 x Blue Light Lamp 3 x Buckles 1 x Cleaning Cloth 1 x Blue Light Test Card