Laptop privacy screen features a magnetic strip to provide a damage-free way to prevent others from viewing your screen. Thin construction allows you to close your laptop & enter sleep mode without removal. Limited viewing angle narrows the field of vision to around 30 degrees to help keep the information on your screen private & reduce the chances of a visual data breach. Blue light reduction filters out harmful rays by up to 22 percent to ease eyestrain & reduce the chances of blue light interrupting natural sleep patterns. Low reflective coating reduces glare from outside light sources for improved viewing clarity. Reversible viewing has a matte finish on one side to reduce glare & fingerprints. The other side is glossy to provide a clearer view of your screen.