21.5" PC Privacy Filter Actual Dimensions (WxH): 18 3/4" (18.8 inches/477 mm)x 10 9/16" (10.6 inches/268 mm), 21.5" diagonal; Compatible with various desktop computer brands, please check before purchasing Confirm the screen size of the computer monitor (you can use the tool to measure or refer to the display parameters). If you have any questions that you don't understand, please contact us. | 【Privacy data protection】 - The privacy filter blocks the line of sight on the left and right sides of the display screen, and the center angle deviates from 30 degrees and gradually turns black. It does not block the line of sight behind and does not affect normal office work. | 【Filter screen blue light, block ultraviolet light】--The surface frosted layer of the computer screen privacy filter can reduce the glare of part of the screen, and the polarized design of the internal structure can block 95% of ultraviolet rays and filter 65% of blue light. After installation, it can effectively protect the eyes from harmful effects. | 【Installation method】One is optical transparent tape (fixed type), the other is detachable type (the mirror can be removed at any time (small gap is convenient for access), the reversible installation of the privacy filter allows you to choose flexibly Glossy or Matte Finish - Choose Matte to reduce external glare on the screen - Choose Glossy to improve clarity. | 【Screen Protection and After Sales】The display screen privacy filter adopts hardening technology, which is scratch-resistant, has high flatness and strong rigidity, and protects your computer screen from foreign objects and daily scratches. If you have any questions while using the product, please contact us. If you are not satisfied with the product, you can choose to exchange or refund. | 【Package content】21.5-inch (16:9) widescreen computer privacy screen filter *1 . microfiber cleaning cloth *1. Optical transparent adhesive strip (installation option 1)*2 . sliding transparencies (installation option 2) *2 . installation manual *1