Refer to the instructions for the installation. Clean the screen and ensure it is dust-free, align the product to screen, gently press over on the frame to remove the bubbles and let the silicone adhered to the frame. Please feel free to contact us if you have any questions about the product or our service. [What's in Box]: Anti-blue light filter for microsoft surface book 15 inch ×1pcs, microfiber cleaning cloth×1pcs, installation cleaning kit×1set. Blue light screen protector installation Guide×1pcs. Blue light screen protector laptop workable for short-sighted people, students, office workers, social media addicts, online gamers, fashion lovers, etc. [Compatibility]: FILMEXT surface book 15 inch blue light screen filter compatible Compatible Microsoft Surface Book 1/2/3 15 inch. [Eye Protection & Reduce Eyestrain] by preventing the injurious blue ray,surface book 15 inch blue light screen protector can protect the eyes from computer/ surface laptop visual syndrome (eyes losing focus, vision getting unclear, fatigue, ophthalmic acid, bulging, headache, etc.).High quality for lasting durability and will protect your eyes from UV rays; surface book 15 inch Anti-glare, anti-fatigue, anti-jet lag blue blocker screen protector Maintains color fidelity Perfect. [Bubble Free Installation] : The latest black frame silicone seal design, easy to install and remove, 100% bubble-free. The blue screen protector for Microsoft Surface Book 1/2 15 inch with fingerprint resistance, and excellent touching sensibility. [ 69.7% Anti-Blue Light Blocking Filter] : for Microsoft Surface Book 2/3 15 inch 69.7% blue light blocking filter blocks the harmful blue light between 380nm~495nm from the wave range of visible lights, blue light reaches the retina with strong energy. This filter reduces digital eye strain when viewing screens and gives you a better sleeping.