Compatible with all iPhone 4 and 4S models Semi-rigid thermoplastic elastomer construction provides protection against minor bumps and abrasions. Compact, slim line design adds minimal bulk to the phone. Textured surface and short, PMAG-style ribs on the sides for added grip. Raised lip protects screen when laid face down yet is small enough so as to not be uncomfortable against the ear. Charging cable port, headphone jack, and ringer/silent switch are accessible with case installed (optimized for use with factory charging cable and headphones).