3M Privacy Screen Protectors allow mobile devices to be used privately in public places without revealing confidential information to prying eyes. User sees the information on the display while people on either side of them see a darkened screen. Custom fit to your Apple iPhone 4/4S. Privacy in portrait; change device orientation to share. Dry application. Matte surface reduces screen glare. Stay-clean edge technology prevents dust and grime from collecting on the edges of screen protector. Protects display from dirt, debris and scratches. Removes easily; leaves no residue. Cleans easily with a soft cloth and water.