The CustomShell for iPhone 4 allows you the freedom to completely customize the back of your iPhone, while still maintaining the protection of a traditional polycarbonate case. This patent-pending case covers the sides and back of the iPhone, while also creating a clear viewing window in the back. This window is sized to fit standard business cards. This means you can easily print graphics, photos, designs, or artwork using commonly available business card templates, and display them on the back of your iPhone. This creative approach delivers the ultimate customizable solution. Want to use the back of your iPhone to display family photos? Show off your company logo? Share your custom artwork? Display printed graphics or designs? No problem! The CustomShell has you covered.