Kantek SVL18.5W display privacy filters Frameless display privacy filter 18.5"

Louver Technology.
Helps ensure the privacy of on-screen data on your Notebook & LCD monitors.
Micro-Louver technology creates a narrow viewing angle. Image is only visible to those directly in front of the screen. Side view is black.
Reduces glare & increases contrast.
Protects delicate LCD surface from damage.
Overlays LCD surface for a built in look.