Kantek Secure-View Blackout Privacy Filter for 21.5-Inch Widescreen Monitors (Measured Diagonally 16:9 Aspect Ratio), Anti-Glare, Anti-Blue Light (SVL21.5W) 21.5" Widescreen (16:9 Ratio)

Keeps confidential work secure from prying eyes so only you see what you're working on,Multi-layer film with louver construction blacks out screen image when viewed from either side, while keeping a crystal-clear image when viewing the screen straight-on,Reduces glare, increases contrast, protects the display from scratches and dirt, and can help health care institutions meet HIPAA Patient Privacy Act compliance,Reduces blue light emissions by over 40%,Lightweight, thin, frameless design is easy to attach and remove, and easy to clean with microfiber cleaning cloth included,Easy installation with 2 attachment options included: 1.) Clear adhesive strips 2.) Side mount tabs,Fits Widescreen LCD Monitors with a diagonal screen measurement of 21.5" (viewable area only) and a 16:9 aspect ratio actual filter dimensions are 18 3/4" W x 10 9/16" H,Before choosing your screen, use measuring instructions in image carousel to ensure you choose appropriately (chart of all available filter sizes available under Technical Specification)