HP PCs - Using the HP Sure View Integrated Privacy Screen | HP® Customer Support
Kensington HP Elite X2 12´´ Privacy Filter Black, Techinn
Amazon.com: Kensington Laptop Screen Privacy Filter for HP Elitebook 840 G5, 2 Way Adhesive Protector Hides Personal & Confidential Data on HP Elitebook 840 G5 Laptop, Reduced Blue Light via Anti-Glare Coating :