1. 20 inch size: width:441mm, height:248mm, diagonal: 20inch, aspect ratio 16:9, , , anti-reflective, lamp reduction and blue, protect monitor against scratches.
2. Applicability: Ideal for keeping screen secrets in areas such as open workspaces, airports, airplanes, trains, cafes, office environments, financial institutions and other public places.
3. Secret Angle: Computer screen filters make the screen appear dark when viewed from a certain angle (angle about 30°-60°), but bright when viewed directly. To change the angle from 60° to 30°, simply adjust the brightness level of the monitor. Effectively hides secrets when viewed from the at 30° or higher. This feature is only available on the left and right side.
4. ANTI-BLUE LAMP, EYE - Protect your eyes by filtering out 96% of rays and suppressing 65% of blue lamp. This is a reversible Secrets screen filter, available on both , giving you the flexibility to choose the glossy or matte side, and select the matte to reduce external glare.
5. Two installation methods: 1. Use the clear adhesive strip to securely attach it to any monitor. 2. Removable snap mount so you can install or remove it as you see fit. Can be installed in about 30 seconds.

Specification:
Item Type: 20 inch computer screen filter
Product material: PET
Product Size:20 inch
Aspect ratio: approx. 16:9 (441 x 248 mm / 17.4 x 9.8 inches).

How to use:
Just take out the product

Packing List:
1 x Protective film
1 x dust-free cloth.
1 x Plastic Tower Buckle
1 x Double- adhesive
1 x user manual (English language not guaranteed).