Laptop privacy screen protector darkens your screen from the sides to prevent visual eavesdropping; Provides clear viewing angle of 60 (+/-30 ) - For 13.3-inch notebooks w/ 16:9 displays; Filter won't interfere with webcams/sensors/closing the lid -Reduce eye strain by blocking up to 51% of blue light; Reversible laptop computer privacy screen with anti-glare matte and high-gloss sides - Attach the ultrabook monitor privacy screen using the transparent adhesive strips or the slide mount tabs