Pong Classic Case for Samsung Galaxy S4, Verizon - Charcoal Black Reduces user's exposure to radiation (SAR) by up to 96% below FCC limit for the Galaxy S4 Just snap it on your smartphone, and the Pong antenna will pair automatically with the antenna inside your Galaxy S4 Tested in the same independent labs that verify conformance of wireless devices to requirements of the US (FCC), European (CE), Canadian (CA) and Australian (ACA) governments. Patented RF technology protects you while maintaining your phone's signal, while still providing open access to all ports and functions. 60-day money back guarantee