1.unique combination of real carbon fiber and polycarbonate 2.a high quality clothing lining create a protetive interior 3.antenna singnal strength is a bit of question mark, too. if we use the full carbon fiber which affect the singal of 4G, so we use the plastic frame + real carbon fiber sheet 4.make to the exact specification of the iphone 4 for a nice secure fit 5.matt finished, UV protected 6.intelligent design offers complete access to all iphone 4 features 7.welcome OEM order