iFrogz BullFrogz Case for iPhone 4 - 1 Pack - Retail Packaging - Silver/Black Two-component case, fashioned from injection-molded, super-durable polycarbonate and ribbed, silicone exterior. Maximum guard against impact damage. Shock absorbent. Shields surface and ports from dust and scratches. AT&T and Verizon (CDMA) compatible. Allows access to all ports, inputs, and sensors. Slides easily in and out of pockets. Core may be used separately.