Zeetron Bionic Shield Premium Tempered Glass Screen Protector for iPhone 4/4S - Retail Packaging Compatible with the iPhone 4 & or 4S Complete Transparency: The BIONIC SHIELD is chemically treated and specially processed to have a transparent tempered glass. Surface Hardness 8~9H: The surface of the glass protector has a hardness three times stronger than regular PET film. Even sharp objects such as knives and keys will not scratch the BIONIC SHIELD. Oleophobic Coating: The BIONIC SHIELD has an oleophobic coating that prevents fingerprints and other contaminates and makes the film easy to clean. Delicate Touch: The bionic shield is coated on the back with a strong silicon adhesive that makes installation easy and attaches the film firmly so it will not affect the touch screens sensitivity