The Pong Case for iPhone 4/4S, Soft Touch Silver/Blue Protects you and your phone by redirecting wireless energy away from you. It"s designed to maintain phone signal to the tower. Reduces exposure to wireless energy (SAR) by up to 82% below FCC limit Built-in Antenna Technology - A patented, wafer-thin antenna inside the case pairs automatically with the antenna inside your phone when you snap it on Pong cases are tested and proven in the same labs that test the devices for government certification. These independent labs are certified to U.S. (FCC), European (CE), Canadian (IC) and Australian (ACA) government standards.