Lenovo Kensington W9: 0

Narrows the field of vision on the monitor to +/- 30 degrees, helping you keep the information on your screen private and reducing the chances of a visual data breach. Filters out the harmful rays by 30%, easing eye strain and reducing the chances of blue light interrupting your natural sleep patterns. One side is to reduce glare and fingerprints. The other side is glossy and provides a clearer view of the monitor. The anti-glare surface uses a special antimicrobial film coating that prevents mildew and bacteria growth, which can cause stains and odors on the film.