PrivaScreen black privacy filter for 54.6 cm (21.5") widescreen displays Blacks out screen image when viewed from the side at 30° to prevent prying eyes from reading your screen Reduces glare and helps prevent eye strain On-screen data is only visible to users directly in front of the monitor Easy to apply and remove Attached to the display with the included clips or adhesive strips Protects the display from dust, fingerprints and scratches