Blue Light Blocking Screen Protector, Protector For Monitor-Widescreen Monitor Frame Hanging Type,Acrylic,Suitable For Long-Time Computer Workers(21" 491 * 288mm)

Material and specifications: ultra-thin acrylic, effectively filter the penetration of high-energy short-wave blue light scattered by the LED screen at 380nm~420nm, retain the original color of the screen, there are 1/2pcs of different specifications that can be freely selected Size selection: 12"-278*178mm, 13"-304*190mm, 14"-320*205mm, 15"-360*220mm, 17"-354*290mm, 18.5"-425*250mm, 19"-425 *277mm, 20"-458*270mm, 21"-491*288mm, 22"-490*317mm, 23"-524*306mm, 24"-547*320mm, 21"-537*330mm, 27"-659* 396mm, 24"-545*374mm, 27"-613*356mm, 32"-730*440mm Take it and use it at any time: Hanging installation-free design, one-piece frameless invisible design, reject screen bubbles All-round protection: protect eyesight, relieve eye fatigue, and at the same time act as the outer layer of the computer, protecting your screen from scratches and dirt, suitable for long-time computer users Easy Installation and Removable: The anti blue screen protector can be easily taken on and off when not in use. Choose between premium adhesive strips or slide mount tabs. Both included applications are easily removable