Thank you for viewing! ♡ Instant purchase is OK ^ ^ It has been opened for photography, but it is unused, so please rest assured ♡ *Uninspected. [Compatible models]: The privacy filter is for 13.5-inch Surface Laptop 5 (2022) / Surface Laptop 4 (2021) / Surface Laptop 3 (2019) / Surface Laptop 2 (2018) / Surface Laptop 1 (2017) [Non-adhesive protective film] Adopts nano-adsorption technology, which has a stronger suction force than magnetic installation and is easy to install. The screen adheres more firmly and securely, and can be used for a longer time. Simply clean the screen, align the screen protector with the screen, and gently press the four edges of the screen protector to apply it. Removal is just as easy. [Privacy protection measures] With a 60-degree viewing angle, the screen is clear when viewed from the front, but the screen appears black from angles other than 60°. This Surface Laptop privacy filter prevents peeking from the side in offices, cafes, airplanes, bullet trains, etc., allowing you to use your Surface Laptop with peace of mind. [Blue light cut & reflection reduction] Excessive exposure to blue light can lead to dry eyes, eye strain, and, if it worsens, headaches and sleep disorders, which can cause "digital jet lag." This Surface Laptop privacy filter blocks approximately 59% of blue light and cuts 99.9% of ultraviolet rays, protecting the eyes from harmful rays for those who work on computers for long hours. It is a blue light cut film that perfectly fits your Surface Laptop. S441(01115)