This Widescreen Monitor Hanging Screen Filter is high-transmittance at front side and screen gets darker when looking from an angle (≥30°）. And it also blocks UV to your eyes and relieve eye fatigue to some extent. Feature: Removable & Reusable With hanging design, easy to use. Free from complicate installation. Dark Screen for Others exact front side is high-transmittance, restoring colors that screen displays. And when looking from an angle (≥30°）,it may be dark or even invisible. One Screen Filter Makes More Space No matter you are in office, public place, or taking exam, you are free from peep from others, makes you work, study or play at ease. Besides, it makes exam more standard and just. Eye Protection It blocks UV to your eyes and relieve eye fatigue. High Transmittance With this design, it restores colors that screen displays, as far as possible. Specification: Material: Acrylic Item size: 540x340mm/ 21.26* 13.39in Packing list: 1 * Hanging Screen Filter 1 * Cleaning cloth Removable & Reusable. With hanging design, easy to use. Free from complicate installation. Dark Screen for Others. exact front side is high-transmittance, restoring colors that screen displays. And when looking from an angle (≥30°）,it may be dark or even invisible. One Screen Filter Makes More Space. No matter you are in office, public place, or taking exam, you are free from peep from others, makes you work, study or play at ease. Besides, it makes exam more standard and just. Eye Protection. It blocks UV to your eyes and relieve eye fatigue. High Transmittance. With this design, it restores colors that screen displays, as far as possible.