24 Inch 16:9 Aspect Ratio Anti-Blue Light Filter, Computer Screen Filter Scratch Eye Protection, for Office, Financial Institutions How to Use: Take out the product and use it Specification: Item Type: 24 Inch Computer Screen Filter Product Material: PET Product Size: 24 Inches Aspect Ratio: 16:9 (Approx.532 x 299mm / 20.9 x 11.8in) Package List: 1 x 24 Inch Computer Screen Filter1 x Dust Free Cloth 3 x Plastic Tower Buckle (1 Long and 2 Short) 1 x Double Sided Tape 1 x User Manual