Features: 1.23 Inch: This computer screen protector is 23 inch and 16:9. Please verify your computer screen's width and height measurements in advance. 2.Viewing Angle Limits: The screen contents are not visible when looking at it from an angle (the angle is about 30 degrees to 60 degrees). And info can be only seen by persons directly in front of the monitor. 3.Eye Protection: This wide screen protector features 96% UV and 65% blue lights blocking, effectively protecting your eyes. One side features anti glare function, and the other side presents clearer images. 4.2 Installation Options: This desktop screen filter supports snap in installation and double sided tape sticking., 5.Wide Application: This computer screen filter is suitable for offices, coffee shops, airports, airplanes, trains and other public places. specification:Item Type: Computer Screen Protector Material: PET Product Size: Approx. 23 Inches Aspect Ratio: Approx. (16:9) 509 x 286mm / 20.0 x 11.3in ( Manual Measurement, Slight Error May Exist ) PackageList:1 x Computer Screen Protector 1 x Cloth 1 x Plastic Hasp 1 x Double Sides Adhesive Tape 1 x User Manual